1966 United States House of Representatives elections explained

Election Name:	1966 United States House of Representatives elections
Country:	United States
Flag Year:	1960
Type:	legislative
Ongoing:	no
Previous Election:	1964 United States House of Representatives elections
Previous Year:	1964
Election Date:	November 8, 1966
Next Election:	1968 United States House of Representatives elections
Next Year:	1968
Majority Seats:	218
Party1:	Democratic Party (US)
Image1:	John W. McCormack (Speaker of the US House)(b) (1).jpg
Leader Since1:	January 10, 1962
Last Election1:	295 seats
Seats1:	248
Seat Change1:	47
Popular Vote1:	26,934,136
Percentage1:	50.9%
Swing1:	6.2%
Party2:	Republican Party (US)
Leader Since2:	January 3, 1965
Last Election2:	140 seats
Seats2:	187
Seat Change2:	47
Popular Vote2:	25,521,157
Percentage2:	48.2%
Swing2:	5.8%
Map Size:	320px
Before Party:	Democratic Party (US)
After Party:	Democratic Party (US)

The 1966 United States House of Representatives elections was an election for the United States House of Representatives on November 8, 1966, to elect members to serve in the 90th United States Congress. They occurred in the middle of President Lyndon B. Johnson's second term. As the Vietnam War continued to escalate and race riots exploded in cities across the country, Johnson's popularity had fallen, and the opposition Republican Party was able to gain a net of 47 seats from Johnson's Democratic Party, which nonetheless maintained a clear majority in the House. This was also the first election that occurred after the Voting Rights Act of 1965 became law, the first time since 1870 that a Republican won a House seat in Arkansas, and the first since 1876 that the party did so in South Carolina (after the same in a 1965 special election for the seat).^[1]

Republican gains

• Alaska's at-large congressional district: four-term Democratic incumbent Ralph Rivers was defeated by Republican State Senator Howard Pollock.
• Arizona's 3rd congressional district: sophomore Democrat George F. Senner Jr. was defeated by state legislator Sam Steiger.
• Arkansas's 3rd congressional district: lumber executive and Arkansas GOP chair John Paul Hammerschmidt defeated incumbent James William Trimble, becoming the first Republican member of Arkansas' congressional delegation since Reconstruction.
• California's 18th congressional district: onetime Olympic gold medalist Bob Mathias defeated seven-term Democratic incumbent Harlan Hagen.
• California's 25th congressional district: Charles E. Wiggins defeated incumbent Democrat Ronald B. Cameron.
• California's 33rd congressional district: Jerry Pettis defeated incumbent Kenneth W. Dyal.
• Texas's 7th congressional district: businessman and 1964 U.S. Senate candidate George H. W. Bush defeated Democratic challenger Frank Briscoe for the seat vacated by John Dowdy (whose district had been renumbered the second).
• Texas's 18th congressional district: Bob Price succeeded retiring Democrat Walter E. Rogers by defeating Dee Miller.

Special elections

Elections are listed by date and district.

|-! | Herbert Covington Bonner| | Democratic| 1940| | Incumbent died November 7, 1965.
New member elected February 5, 1966.
Democratic hold; winner was later re-elected.| nowrap |

|-! | John Lindsay| | Republican| 1958| | Incumbent resigned December 31, 1965 to become Mayor of New York City.
New member elected February 8, 1966.
Republican hold; winner was later re-elected.| nowrap |

|-! | Albert Thomas| | Democratic| 1936| | Incumbent died February 15, 1966.
New member elected March 26, 1966.
Democratic hold; winner did not seek re-election.| nowrap |

|-! | John F. Baldwin Jr.| | Republican| 1954| | Incumbent died March 9, 1966.
New member elected June 7, 1966.
Democratic gain; winner was later re-elected.| nowrap |

|}

Overall results

↓

248	187
Democrat	Republican

Parties	Seats				Popular Vote
1964	1966	Change	Strength	Vote	%	Change
	Democratic Party	align=right	295	align=right	248	align=right	47	align=right	57.0%	align=right	26,934,136	align=right	50.9%	align=right	6.2%
	Republican Party	align=right	140	align=right	187	align=right	47	align=right	43.0%	align=right	25,521,157	align=right	48.2%	align=right	5.8%
	Conservative Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	208,756	align=right	0.4%	align=right	0.3%
	Independent	align=right	–	align=right	–	align=right	–	align=right	–	align=right	85,641	align=right	0.2%	align=right
	Liberal Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	75,303	align=right	0.1%	align=right	0.1%
	Peace and Freedom Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	16,922	align=right	<0.1%	align=right
	American Independent Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	14,461	align=right	<0.1%	align=right
	Constitution Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	11,110	align=right	<0.1%	align=right
	Socialist Labor Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	5,771	align=right	<0.1%	align=right
	Independent-Socialist Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	3,502	align=right	<0.1%	align=right
	New Hispano Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	2,263	align=right	<0.1%	align=right
	People's Choice Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	1,299	align=right	<0.1%	align=right
	Socialist Workers Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	1,014	align=right	<0.1%	align=right
	Veteran Party	align=right	–	align=right	–	align=right	–	align=right	–	align=right	939	align=right	<0.1%	align=right
	Others	align=right	–	align=right	–	align=right	–	align=right	–	align=right	29,701	align=right	0.1%	align=right	0.1%
Total	435	435	0	100.0%	52,901,975	100.0%	——

Source: Election Statistics – Office of the Clerk

¹ One vacancy due to refusal of House to seat Adam Clayton Powell Jr. (D-New York)

Alabama

See also: List of United States representatives from Alabama.

|-! | Jack Edwards| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | William L. Dickinson| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | George W. Andrews| | Democratic| 1944| Incumbent re-elected.| nowrap |

|-! | Glenn Andrews| | Republican| 1964| | Incumbent lost re-election.
New member elected.
Democratic gain.| nowrap |

|-! | Armistead I. Selden Jr.| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | John H. Buchanan Jr.| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | James D. Martin| | Republican| 1964| | Incumbent retired to run for Governor of Alabama.
New member elected.
Democratic gain.| nowrap |

|-! | Robert E. Jones Jr.| | Democratic| 1947 | Incumbent re-elected.| nowrap |

|}

Alaska

See also: List of United States representatives from Alaska.

|-! | Ralph Rivers| | Democratic| 1958| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Arizona

See also: List of United States representatives from Arizona.

|-! | John Jacob Rhodes| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Mo Udall| | Democratic| 1961 | Incumbent re-elected.| nowrap |

|-! | George F. Senner Jr.| | Democratic| 1962| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Arkansas

See also: List of United States representatives from Arkansas.

|-! | Ezekiel C. Gathings| | Democratic| 1938| Incumbent re-elected.| nowrap |

|-! | Wilbur Mills| | Democratic| 1938| Incumbent re-elected.| nowrap |

|-! | James William Trimble| | Democratic| 1944| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Oren Harris| | Democratic| 1940| | Incumbent resigned to become district judge.
New member elected.
Democratic hold.| nowrap |

|}

California

See also: List of United States representatives from California.

|-! | Don Clausen| | Republican| 1963 | Incumbent re-elected.| nowrap |

|-! | Bizz Johnson| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | John E. Moss| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | Robert Leggett| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Phillip Burton| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | William S. Mailliard| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Jeffery Cohelan| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | George P. Miller| | Democratic| 1944| Incumbent re-elected.| nowrap |

|-! | Don Edwards| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Charles Gubser| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | J. Arthur Younger| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Burt Talcott| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Charles M. Teague| | Republican| 1954| Incumbent re-elected.| nowrap |

|-! | Jerome Waldie| | Democratic| 1966| Incumbent re-elected.| nowrap |

|-! | John J. McFall| | Democratic| 1956| Incumbent re-elected.| nowrap |

|-! | B. F. Sisk| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Cecil R. King| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | Harlan Hagen| | Democratic| 1952| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Chet Holifield| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | H. Allen Smith| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | Augustus Hawkins| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | James C. Corman| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Del M. Clawson| | Republican| 1963 | Incumbent re-elected.| nowrap |

|-! | Glenard P. Lipscomb| | Republican| 1953 | Incumbent re-elected.| nowrap |

|-! | Ronald B. Cameron| | Democratic| 1962| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Thomas M. Rees| | Democratic| 1965 | Incumbent re-elected.| nowrap |

|-! | Edwin Reinecke| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Alphonzo E. Bell Jr.| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | George Brown Jr.| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Edward R. Roybal| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Charles H. Wilson| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Craig Hosmer| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Kenneth W. Dyal| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Richard T. Hanna| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | James B. Utt| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Bob Wilson| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Lionel Van Deerlin| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | John V. Tunney| | Democratic| 1964| Incumbent re-elected.| nowrap |

|}

Colorado

See also: List of United States representatives from Colorado.

|-! | Byron G. Rogers| | Democratic| 1950| Incumbent re-elected.| nowrap |

|-! | Roy H. McVicker| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Frank Evans| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Wayne N. Aspinall| | Democratic| 1948| Incumbent re-elected.| nowrap |

|}

Connecticut

See also: List of United States representatives from Connecticut.

|-! | Emilio Q. Daddario| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | William St. Onge| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Robert Giaimo| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Donald J. Irwin| | Democratic| 1958
1960
1964| Incumbent re-elected.| nowrap |

|-! | John S. Monagan| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Bernard F. Grabowski| | Democratic| 1962| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Delaware

See also: List of United States representatives from Delaware.

|-! | Harris McDowell| | Democratic| 1958| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Florida

See also: List of United States representatives from Florida.

Florida redistricted to adjust for demographic changes; in addition to minor boundary changes a district was removed from northern Florida, and Broward County was broken out into its own district.^[2]

|-! | Bob Sikes| | Democratic| 1940
1944
1974| Incumbent re-elected.| nowrap | Bob Sikes (Democratic) Unopposed

|-! rowspan=2 | | Don Fuqua
| | Democratic| 1962| Incumbent re-elected.| rowspan=2 nowrap |

|-| D. R. Matthews
| | Democratic| 1952| | Incumbent lost renomination.
Democratic loss.

|-! | Charles E. Bennett
| | Democratic| 1948| Incumbent re-elected.| nowrap | Charles E. Bennett (Democratic) Unopposed

|-! | Syd Herlong
| | Democratic| 1948| Incumbent re-elected.| nowrap | Syd Herlong (Democratic) Unopposed

|-! | Edward Gurney
| | Republican| 1962| Incumbent re-elected.| nowrap | Edward Gurney (Republican) Unopposed

|-! | Sam Gibbons
| | Democratic| 1962| Incumbent re-elected.| nowrap | Sam Gibbons (Democratic) Unopposed

|-! | James A. Haley| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | William C. Cramer
| | Republican| 1954| Incumbent re-elected.| nowrap |

|-! | Paul Rogers
| | Democratic| 1954| Incumbent re-elected.| nowrap | Paul Rogers (Democratic) Unopposed

|-! | colspan=3 | None (district created)| | New seat.
Republican gain.| nowrap |

|-! | Claude Pepper
| | Democratic| 1962| Incumbent re-elected.| nowrap | Claude Pepper (Democratic) Unopposed

|-! | Dante Fascell
| | Democratic| 1954| Incumbent re-elected.| nowrap |

|}

Georgia

See also: List of United States representatives from Georgia.

|-! | G. Elliott Hagan| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Maston E. O'Neal Jr.| | Democratic| 1964| Incumbent re-elected.| nowrap | Maston E. O'Neal Jr. (Democratic) Unopposed

|-! | Bo Callaway| | Republican| 1964| | Incumbent retired to run for governor.
New member elected.
Democratic gain.| nowrap |

|-! | James MacKay| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Charles L. Weltner| | Democratic| 1962| | Incumbent withdrew and was replaced on the ballot.
New member elected.
Republican gain.| nowrap |

|-! | John Flynt| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | John William Davis| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | J. Russell Tuten| | Democratic| 1962| | Incumbent lost renomination.
New member elected.
Democratic hold.| nowrap |

|-! | Phillip M. Landrum| | Democratic| 1952| Incumbent re-elected.| nowrap | Phillip M. Landrum (Democratic) Unopposed

|-! | Robert Grier Stephens Jr.| | Democratic| 1960| Incumbent re-elected.| nowrap |

|}

Hawaii

See also: List of United States representatives from Hawaii.

|-! rowspan=2 | | Spark Matsunaga| | Democratic| 1962| Incumbent re-elected.| rowspan=2 nowrap |

|-| Patsy Mink| | Democratic| 1964| Incumbent re-elected.

|}

Idaho

See also: List of United States representatives from Idaho.

|-! | Compton I. White Jr.| | Democratic| 1962| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | George V. Hansen| | Republican| 1964| Incumbent re-elected.| nowrap |

|}

Illinois

See also: List of United States representatives from Illinois.

|-! | William L. Dawson| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | Barratt O'Hara| | Democratic| 1948
1950
1952| Incumbent re-elected.| nowrap |

|-! | William T. Murphy| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Ed Derwinski| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | John C. Kluczynski| | Democratic| 1950| Incumbent re-elected.| nowrap |

|-! | Daniel J. Ronan| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Frank Annunzio| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Dan Rostenkowski| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Sidney R. Yates| | Democratic| 1948
1962
1964| Incumbent re-elected.| nowrap |

|-! | Harold R. Collier| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | Roman Pucinski| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Robert McClory| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Donald Rumsfeld| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | John N. Erlenborn| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Charlotte Thompson Reid| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | John B. Anderson| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Leslie C. Arends| | Republican| 1934| Incumbent re-elected.| nowrap |

|-! | Robert H. Michel| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | Gale Schisler| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Paul Findley| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Kenneth J. Gray| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | William L. Springer| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | George E. Shipley| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Melvin Price| | Democratic| 1944| Incumbent re-elected.| nowrap |

|}

Indiana

See also: List of United States representatives from Indiana.

Indiana redistricted for this election, election boundary changes forced two Republican incumbents into the same district while creating a new district that was won by another Republican.

|-! | Ray Madden| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | Charles A. Halleck| | Republican| 1935 | Incumbent re-elected.| nowrap |

|-! | John Brademas| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | E. Ross Adair| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | J. Edward Roush| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | William G. Bray
| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | colspan=3 | None (district created)| | New seat.
Republican gain.| nowrap |

|-! | Winfield K. Denton| | Democratic| 1954| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Lee Hamilton| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! rowspan=2 | | Richard L. Roudebush
| | Republican| 1960| Incumbent re-elected.| rowspan=2 nowrap |

|-| Ralph Harvey| | Republican| 1960| | Incumbent lost renomination.
Republican loss.

|-! | Andrew Jacobs Jr.| | Democratic| 1964| Incumbent re-elected.| nowrap |

|}

Iowa

See also: List of United States representatives from Iowa.

|-! | John R. Schmidhauser| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | John Culver| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | H. R. Gross| | Republican| 1948| Incumbent re-elected.| nowrap |

|-! | Bert Bandstra| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Neal Smith| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Stanley L. Greigg| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | John R. Hansen| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Kansas

See also: List of United States representatives from Kansas.

|-! | Bob Dole| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Chester L. Mize| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Robert Ellsworth| | Republican| 1960| | Incumbent retired to run for U.S. senator.
New member elected.
Republican hold.| nowrap |

|-! | Garner E. Shriver| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Joe Skubitz| | Republican| 1962| Incumbent re-elected.| nowrap |

|}

Kentucky

See also: List of United States representatives from Kentucky.

|-! | Frank Stubblefield| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | William Natcher| | Democratic| 1953 | Incumbent re-elected.| nowrap |

|-! | Charles R. Farnsley| | Democratic| 1964| | Incumbent retired.
New member elected.
Republican gain.| nowrap |

|-! | Frank Chelf| | Democratic| 1944| | Incumbent retired, but replaced John Moloney on the ballot after he died 2 days before the election.
Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Tim Lee Carter| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | John C. Watts| | Democratic| 1951 | Incumbent re-elected.| nowrap |

|-! | Carl D. Perkins| | Democratic| 1948| Incumbent re-elected.| nowrap |

|}

Louisiana

See also: List of United States representatives from Louisiana.

|-! | F. Edward Hébert| | Democratic| 1940| Incumbent re-elected.| nowrap |

|-! | Hale Boggs| | Democratic| 1940
1942
1946| Incumbent re-elected.| nowrap |

|-! | Edwin E. Willis| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | Joe Waggonner| | Democratic| 1961 | Incumbent re-elected.| nowrap |

|-! | Otto Passman| | Democratic| 1946| Incumbent re-elected.| nowrap |

|-! | James H. Morrison| | Democratic| 1942| | Incumbent lost renomination.
New member elected.
Democratic hold.| nowrap |

|-! | Edwin Edwards| | Democratic| 1965 | Incumbent re-elected.| nowrap |

|-! | Speedy Long| | Democratic| 1964| Incumbent re-elected.| nowrap |

|}

Maine

See also: List of United States representatives from Maine.

|-! | Stanley R. Tupper| | Republican| 1960| | Incumbent retired.
New member elected.
Democratic gain.| nowrap |

|-! | William Hathaway| | Democratic| 1964| Incumbent re-elected.| nowrap |

|}

Maryland

See also: List of United States representatives from Maryland.

Maryland redistricted its at-large district into an 8th district around Montgomery County, managing to adjust boundaries so no existing incumbents were displaced.

|-! | Rogers Morton| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Clarence Long| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Edward Garmatz| | Democratic| 1947 | Incumbent re-elected.| nowrap | Edward Garmatz (Democratic) Unopposed

|-! | George Hyde Fallon| | Democratic| 1944| Incumbent re-elected.| nowrap |

|-! | Hervey Machen| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Charles Mathias| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Samuel Friedel| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | Carlton R. Sickles
| | Democratic| 1962| | Incumbent retired to run for governor.
New member elected.
Republican gain.| nowrap |

|}

Massachusetts

See also: List of United States representatives from Massachusetts.

|-! | Silvio O. Conte| | Republican| 1958| Incumbent re-elected.| nowrap | Silvio O. Conte (Republican) Unopposed

|-! | Edward Boland| | Democratic| 1952| Incumbent re-elected.| nowrap | Edward Boland (Democratic) Unopposed

|-! | Philip J. Philbin| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | Harold Donohue| | Democratic| 1946| Incumbent re-elected.| nowrap | Harold Donohue (Democratic) Unopposed

|-! | F. Bradford Morse| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | William H. Bates| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | Torbert Macdonald| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Tip O'Neill| | Democratic| 1952| Incumbent re-elected.| nowrap | Tip O'Neill (Democratic) Unopposed

|-! | John W. McCormack| | Democratic| 1928| Incumbent re-elected.| nowrap | John W. McCormack (Democratic) Unopposed

|-! | Joseph W. Martin Jr.| | Republican| 1924| | Incumbent lost renomination.
New member elected.
Republican hold.| nowrap |

|-! | James A. Burke| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Hastings Keith| | Republican| 1958| Incumbent re-elected.| nowrap |

|}

Michigan

See also: List of United States representatives from Michigan.

|-! | John Conyers| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Weston E. Vivian| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Paul H. Todd Jr.| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | J. Edward Hutchinson| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Gerald Ford| | Republican| 1948| Incumbent re-elected.| nowrap |

|-! | Charles E. Chamberlain| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | John C. Mackie| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | R. James Harvey| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Robert P. Griffin| | Republican| 1956| | Resigned to become U.S. senator.
New member elected.
Republican hold.| nowrap |

|-! | Al Cederberg| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Raymond F. Clevenger| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | James G. O'Hara| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Charles Diggs| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Lucien Nedzi| | Democratic| 1961 | Incumbent re-elected.| nowrap |

|-! | William D. Ford| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | John Dingell| | Democratic| 1955 | Incumbent re-elected.| nowrap |

|-! | Martha Griffiths| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | William Broomfield| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | Billie S. Farnum| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Minnesota

See also: List of United States representatives from Minnesota.

|-! | Al Quie| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Ancher Nelsen| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Clark MacGregor| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Joseph Karth| | DFL| 1958| Incumbent re-elected.| nowrap |

|-! | Donald M. Fraser| | DFL| 1962| Incumbent re-elected.| nowrap |

|-! | Alec G. Olson| | DFL| 1962| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Odin Langen| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | John Blatnik| | DFL| 1946| Incumbent re-elected.| nowrap | John Blatnik (DFL) Unopposed

|}

Mississippi

See also: List of United States representatives from Mississippi.

|-! | Thomas Abernethy| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | Jamie Whitten| | Democratic| 1941 | Incumbent re-elected.| nowrap |

|-! | John Bell Williams| | Democratic| 1946| Incumbent re-elected.| nowrap |

|-! | Prentiss Walker| | Republican| 1964| | Incumbent retired to run for U.S. Senator.
New member elected.
Democratic gain.| nowrap |

|-! | William M. Colmer| | Democratic| 1932| Incumbent re-elected.| nowrap |

|}

Missouri

See also: List of United States representatives from Missouri.

|-! | Frank M. Karsten| | Democratic| 1946| Incumbent re-elected.| nowrap |

|-! | Thomas B. Curtis| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | Leonor Sullivan| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | William J. Randall| | Democratic| 1959 | Incumbent re-elected.| nowrap |

|-! | Richard W. Bolling| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | William R. Hull Jr.| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Durward G. Hall| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Richard H. Ichord Jr.| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | William L. Hungate| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Paul C. Jones| | Democratic| 1948| Incumbent re-elected.| nowrap |

|}

Montana

See also: List of United States representatives from Montana.

|-! | Arnold Olsen| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | James F. Battin| | Republican| 1960| Incumbent re-elected.| nowrap |

|}

Nebraska

See also: List of United States representatives from Nebraska.

|-! | Clair A. Callan| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Glenn Cunningham| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | David Martin| | Republican| 1960| Incumbent re-elected.| nowrap |

|}

Nevada

See also: List of United States representatives from Nevada.

|-! | Walter S. Baring Jr.| | Democratic| 1948
1952
1956| Incumbent re-elected.| nowrap |

|}

New Hampshire

See also: List of United States representatives from New Hampshire.

|-! | J. Oliva Huot| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | James Colgate Cleveland| | Republican| 1962| Incumbent re-elected.| nowrap |

|}

New Jersey

See also: List of United States representatives from New Jersey.

|-! | colspan=3 | None (district created)| | New seat.
Republican gain.| nowrap |

|-! | Thomas C. McGrath Jr.| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | James J. Howard| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Frank Thompson| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Peter Frelinghuysen Jr.| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | William T. Cahill
| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | William B. Widnall| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | Charles S. Joelson| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Henry Helstoski| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Peter W. Rodino| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | Joseph Minish| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! rowspan=2 | | Florence P. Dwyer
| | Republican| 1956| Incumbent re-elected.| rowspan=2 nowrap |

|-| Paul J. Krebs| | Democratic| 1964| | Incumbent retired.
Democratic loss.

|-! | Neil Gallagher| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Dominick V. Daniels| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Edward J. Patten| | Democratic| 1962| Incumbent re-elected.| nowrap |

|}

New Mexico

See also: List of United States representatives from New Mexico.

|-! rowspan=2 | | Thomas G. Morris| | Democratic| 1958| Incumbent re-elected.| rowspan=2 nowrap |

|-| E. S. Johnny Walker| | Democratic| 1964| Incumbent re-elected.

|}

New York

See also: List of United States representatives from New York.

|-! | Otis G. Pike| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | James R. Grover Jr.| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Lester L. Wolff| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | John W. Wydler| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Herbert Tenzer| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Seymour Halpern| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Joseph P. Addabbo| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Benjamin Rosenthal| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | James J. Delaney| | Democratic| 1944
1946
1948| Incumbent re-elected.| nowrap |

|-! | Emanuel Celler| | Democratic| 1922| Incumbent re-elected.| nowrap |

|-! | Eugene Keogh| | Democratic| 1936| | Incumbent retired.
New member elected.
Democratic hold.| nowrap |

|-! | Edna F. Kelly| | Democratic| 1949 | Incumbent re-elected.| nowrap |

|-! | Abraham J. Multer| | Democratic| 1947 | Incumbent re-elected.| nowrap |

|-! | John J. Rooney| | Democratic| 1944| Incumbent re-elected.| nowrap |

|-! | Hugh Carey| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | John M. Murphy| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Theodore R. Kupferman| | Republican| 1966 (special)| Incumbent re-elected.| nowrap |

|-! | Adam Clayton Powell Jr.| | Democratic| 1944| Incumbent re-elected.| nowrap |

|-! | Leonard Farbstein| | Democratic| 1956| Incumbent re-elected.| nowrap |

|-! | William Fitts Ryan| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | James H. Scheuer| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Jacob H. Gilbert| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Jonathan B. Bingham| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Paul A. Fino| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Richard Ottinger| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Ogden R. Reid| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | John G. Dow| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Joseph Y. Resnick| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Leo W. O'Brien| | Democratic| 1952| | Incumbent retired.
New member elected.
Republican gain.| nowrap |

|-! | Carleton J. King| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Robert C. McEwen| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Alexander Pirnie| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Howard W. Robison| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | James M. Hanley| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Samuel S. Stratton| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Frank Horton| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Barber Conable| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Charles Goodell| | Republican| 1959 | Incumbent re-elected.| nowrap |

|-! | Richard D. McCarthy| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Henry P. Smith III| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Thaddeus J. Dulski| | Democratic| 1958| Incumbent re-elected.| nowrap |

|}

North Carolina

See also: List of United States representatives from North Carolina.

|-! | Walter B. Jones Sr.| | Democratic| 1966 (special)| Incumbent re-elected.| nowrap |

|-! | Lawrence H. Fountain| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | David N. Henderson| | Democratic| 1960| Incumbent re-elected.| nowrap | David N. Henderson (Democratic) Unopposed

|-! | Harold D. Cooley| | Democratic| 1934| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Ralph James Scott| | Democratic| 1956| | Incumbent retired.
New member elected.
Democratic hold.| nowrap |

|-! | Horace R. Kornegay| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Alton Lennon| | Democratic| 1956| Incumbent re-elected.| nowrap | Alton Lennon (Democratic) Unopposed

|-! | Charles R. Jonas| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Jim Broyhill| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Basil Whitener| | Democratic| 1956| Incumbent re-elected.| nowrap |

|-! | Roy A. Taylor| | Democratic| 1960| Incumbent re-elected.| nowrap |

|}

North Dakota

See also: List of United States representatives from North Dakota.

|-! | Mark Andrews| | Republican| 1963 | Incumbent re-elected.| nowrap |

|-! | Rolland W. Redlin| | Democratic-NPL| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Ohio

See also: List of United States representatives from Ohio.

Ohio redistricted its at-large seat into a 24th district, splitting out the counties to the southwest of Dayton from the city itself, as well as moving a district in southeastern Ohio into the Columbus area.

|-! | John J. Gilligan| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Donald D. Clancy| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Rodney M. Love| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | William M. McCulloch| | Republican| 1947 | Incumbent re-elected.| nowrap |

|-! | Del Latta| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Bill Harsha| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Bud Brown| | Republican| 1965| Incumbent re-elected.| nowrap | Bud Brown (Republican) Unopposed

|-! | Jackson Edward Betts| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | Thomas L. Ashley| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Walter H. Moeller| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | J. William Stanton| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Samuel L. Devine| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Charles Adams Mosher| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | William Hanes Ayres| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | colspan=3 | None (district created)| | New seat.
Republican gain.| nowrap |

|-! | Frank T. Bow| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! rowspan=2 | | John M. Ashbrook| | Republican| 1960| Incumbent re-elected.| rowspan=2 nowrap |

|-| Robert T. Secrest
| | Democratic| 1962| | Incumbent lost re-election.
Democratic loss.

|-! | Wayne Hays| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | Michael J. Kirwan| | Democratic| 1936| Incumbent re-elected.| nowrap |

|-! | Michael A. Feighan| | Democratic| 1942| Incumbent re-elected.| nowrap |

|-! | Charles Vanik| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Frances P. Bolton| | Republican| 1940| Incumbent re-elected.| nowrap |

|-! | William E. Minshall Jr.| | Republican| 1954| Incumbent re-elected.| nowrap |

|-! | Robert E. Sweeney
| | Democratic| 1964| | Incumbent retired.
New member elected.
Republican gain.| nowrap |

|}

Oklahoma

See also: List of United States representatives from Oklahoma.

|-! | Page Belcher| | Republican| 1950| Incumbent re-elected.| nowrap |

|-! | Ed Edmondson| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | Carl Albert| | Democratic| 1946| Incumbent re-elected.| nowrap |

|-! | Tom Steed| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | John Jarman| | Democratic| 1950| Incumbent re-elected.| nowrap |

|-! | Jed Johnson Jr.| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Oregon

See also: List of United States representatives from Oregon.

|-! | Wendell Wyatt| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Al Ullman| | Democratic| 1956| Incumbent re-elected.| nowrap |

|-! | Edith Green| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Robert B. Duncan| | Democratic| 1962| | Incumbent retired to run for U.S. Senator.
New member elected.
Republican gain.| nowrap |

|}

Pennsylvania

See also: List of United States representatives from Pennsylvania.

|-! | William A. Barrett| | Democratic| 1944
1946
1948| Incumbent re-elected.| nowrap |

|-! | Robert N. C. Nix Sr.| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | James A. Byrne| | Democratic| 1952| Incumbent re-elected.| nowrap |

|-! | Herman Toll| | Democratic| 1958| | Incumbent retired.
New member elected.
Democratic hold.| nowrap |

|-! | William J. Green III| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | George M. Rhodes| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | colspan=3 | None (district created)| | New seat.
Republican gain.| nowrap |

|-! | Willard S. Curtin| | Republican| 1956| | Incumbent retired.
New member elected.
Republican hold.| nowrap |

|-! rowspan=2 | | George Watkins
| | Republican| 1964| Incumbent re-elected.| rowspan=2 nowrap |

|-| Paul B. Dague| | Republican| 1946| | Incumbent retired.
Republican loss.

|-! | Joseph M. McDade| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Dan Flood| | Democratic| 1944
1946
1948
1952
1954| Incumbent re-elected.| nowrap |

|-! | J. Irving Whalley| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Richard Schweiker| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | William S. Moorhead| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Fred B. Rooney| | Democratic| 1963 | Incumbent re-elected.| nowrap |

|-! | John C. Kunkel| | Republican| 1961 | | Incumbent retired.
New member elected.
Republican hold.| nowrap |

|-! | Herman T. Schneebeli| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Robert J. Corbett| | Republican| 1938
1940
1944| Incumbent re-elected.| nowrap |

|-! | Nathaniel N. Craley Jr.| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Elmer J. Holland| | Democratic| 1942
1942
1956 | Incumbent re-elected.| nowrap |

|-! | John Herman Dent| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | John P. Saylor| | Republican| 1949 | Incumbent re-elected.| nowrap |

|-! | Albert W. Johnson| | Republican| 1963 | Incumbent re-elected.| nowrap |

|-! | Joseph P. Vigorito| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Frank M. Clark| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | Thomas E. Morgan| | Democratic| 1944| Incumbent re-elected.| nowrap |

|-! | James G. Fulton| | Republican| 1944| Incumbent re-elected.| nowrap |

|}

Rhode Island

See also: List of United States representatives from Rhode Island.

|-! | Fernand St Germain| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | John E. Fogarty| | Democratic| 1940| Incumbent re-elected.| nowrap |

|}

South Carolina

See main article: 1966 United States House of Representatives elections in South Carolina.

See also: List of United States representatives from South Carolina.

|-! | L. Mendel Rivers| | Democratic| 1940| Incumbent re-elected.| nowrap | L. Mendel Rivers (Democratic) Unopposed

|-! | Albert Watson| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | William J. B. Dorn| | Democratic| 1946
1948
1950| Incumbent re-elected.| nowrap |

|-! | Robert T. Ashmore| | Democratic| 1953 | Incumbent re-elected.| nowrap | Robert T. Ashmore (Democratic) Unopposed

|-! | Thomas S. Gettys| | Democratic| 1964| Incumbent re-elected.| nowrap | Thomas S. Gettys (Democratic) Unopposed

|-! | John L. McMillan| | Democratic| 1938| Incumbent re-elected.| nowrap |

|}

South Dakota

See also: List of United States representatives from South Dakota.

|-! | Ben Reifel| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | E. Y. Berry| | Republican| 1950| Incumbent re-elected.| nowrap |

|}

Tennessee

See also: List of United States representatives from Tennessee.

|-! | Jimmy Quillen| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | John Duncan Sr.| | Republican| 1964| Incumbent re-elected.| nowrap |

|-! | Bill Brock| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | Joe L. Evins| | Democratic| 1946| Incumbent re-elected.| nowrap |

|-! | Richard Fulton| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | William Anderson| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Tom J. Murray| | Democratic| 1942| | Incumbent lost renomination.
New member elected.
Democratic hold.| nowrap |

|-! | Fats Everett| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | George W. Grider| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Texas

See also: List of United States representatives from Texas.

Texas redistricted for this election, eliminating its at-large district and removing two East Texas districts in favor of adding three districts in South Texas, suburban Houston, and suburban Dallas.

|-! | Wright Patman| | Democratic| 1928| Incumbent re-elected.| nowrap | Wright Patman (Democratic) Unopposed

|-! | John Dowdy
| | Democratic| 1952| Incumbent re-elected.| nowrap | John Dowdy (Democratic) Unopposed

|-! | Joe R. Pool
| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! rowspan=2 | | Ray Roberts| | Democratic| 1962| Incumbent re-elected.| rowspan=2 nowrap | Ray Roberts (Democratic) Unopposed

|-| Lindley Beckworth
| | Democratic| 1956| | Incumbent lost renomination.
Democratic loss.

|-! | Earle Cabell| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Olin E. Teague| | Democratic| 1946| Incumbent re-elected.| nowrap | Olin E. Teague (Democratic) Unopposed

|-! | colspan=3 | None (district created)| | New seat.
Republican gain.| nowrap |

|-! | Lera Millard Thomas| | Democratic| 1966| | Incumbent retired.
New member elected.
Democratic hold.| nowrap |

|-! rowspan=2 | | Jack Brooks
| | Democratic| 1952| Incumbent re-elected.| rowspan=2 nowrap | Jack Brooks (Democratic) Unopposed

|-| Clark W. Thompson| | Democratic| 1947 | | Incumbent retired.
Democratic loss.

|-! | J. J. Pickle| | Democratic| 1963 | Incumbent re-elected.| nowrap |

|-! | William R. Poage| | Democratic| 1936| Incumbent re-elected.| nowrap |

|-! | Jim Wright| | Democratic| 1954| Incumbent re-elected.| nowrap | Jim Wright (Democratic) Unopposed

|-! | Graham B. Purcell Jr.| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | John Andrew Young| | Democratic| 1956| Incumbent re-elected.| nowrap | John Andrew Young (Democratic) Unopposed

|-! | Kika de la Garza| | Democratic| 1964| Incumbent re-elected.| nowrap | Kika de la Garza (Democratic) Unopposed

|-! | Richard Crawford White| | Democratic| 1964| Incumbent re-elected.| nowrap | Richard Crawford White (Democratic) Unopposed

|-! | Omar Burleson| | Democratic| 1946| Incumbent re-elected.| nowrap | Omar Burleson (Democratic) Unopposed

|-! | Walter E. Rogers| | Democratic| 1950| | Incumbent retired.
New member elected.
Republican gain.| nowrap |

|-! | George H. Mahon| | Democratic| 1934| Incumbent re-elected.| nowrap | George H. Mahon (Democratic) Unopposed

|-! | Henry B. González| | Democratic| 1961 | Incumbent re-elected.| nowrap |

|-! | O. C. Fisher| | Democratic| 1942| Incumbent re-elected.| nowrap | O. C. Fisher (Democratic) Unopposed

|-! | Robert R. Casey| | Democratic| 1958| Incumbent re-elected.| nowrap | Robert R. Casey (Democratic) Unopposed

|-! | colspan=3 | None (district created)| | New seat.
Democratic gain.| nowrap |

|}

Utah

See also: List of United States representatives from Utah.

|-! | Laurence J. Burton| | Republican| 1962| Incumbent re-elected.| nowrap |

|-! | David S. King| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|}

Vermont

See also: List of United States representatives from Vermont.

|-! | Robert Stafford| | Republican| 1960| Incumbent re-elected.| nowrap |

|}

Virginia

See also: List of United States representatives from Virginia.

|-! | Thomas N. Downing| | Democratic| 1958| Incumbent re-elected.| nowrap | Thomas N. Downing (Democratic) Unopposed

|-! | Porter Hardy Jr.| | Democratic| 1946| Incumbent re-elected.| nowrap | Porter Hardy Jr. (Democratic) Unopposed

|-! | David E. Satterfield III| | Democratic| 1964| Incumbent re-elected.| nowrap | David E. Satterfield III (Democratic) Unopposed

|-! | Watkins Abbitt| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | William M. Tuck| | Democratic| 1953 | Incumbent re-elected.| nowrap |

|-! | Richard H. Poff| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | John O. Marsh Jr.| | Democratic| 1962| Incumbent re-elected.| nowrap |

|-! | Howard W. Smith| | Democratic| 1930| | Incumbent lost renomination.
New member elected.
Republican gain.| nowrap |

|-! | W. Pat Jennings| | Democratic| 1954| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Joel Broyhill| | Republican| 1952| Incumbent re-elected.| nowrap |

|}

Washington

See also: List of United States representatives from Washington.

|-! | Thomas Pelly| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | Lloyd Meeds| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Julia Butler Hansen| | Democratic| 1960| Incumbent re-elected.| nowrap |

|-! | Catherine Dean May| | Republican| 1958| Incumbent re-elected.| nowrap |

|-! | Tom Foley| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Floyd Hicks| | Democratic| 1964| Incumbent re-elected.| nowrap |

|-! | Brock Adams| | Democratic| 1964| Incumbent re-elected.| nowrap |

|}

West Virginia

See also: List of United States representatives from West Virginia and 1966 United States Senate election in West Virginia.

|-! | Arch A. Moore Jr.| | Republican| 1956| Incumbent re-elected.| nowrap |

|-! | Harley Orrin Staggers| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | John M. Slack Jr.| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Ken Hechler| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | James Kee| | Democratic| 1964| Incumbent re-elected.| nowrap |

|}

Wisconsin

See also: List of United States representatives from Wisconsin.

|-! | Lynn E. Stalbaum| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Robert Kastenmeier| | Democratic| 1958| Incumbent re-elected.| nowrap |

|-! | Vernon W. Thomson| | Republican| 1960| Incumbent re-elected.| nowrap |

|-! | Clement Zablocki| | Democratic| 1948| Incumbent re-elected.| nowrap |

|-! | Henry S. Reuss| | Democratic| 1954| Incumbent re-elected.| nowrap |

|-! | John Abner Race| | Democratic| 1964| | Incumbent lost re-election.
New member elected.
Republican gain.| nowrap |

|-! | Melvin Laird| | Republican| 1952| Incumbent re-elected.| nowrap |

|-! | John W. Byrnes| | Republican| 1944| Incumbent re-elected.| nowrap |

|-! | Glenn Robert Davis| | Republican| 1947
1956
1964| Incumbent re-elected.| nowrap |

|-! | Alvin O'Konski| | Republican| 1942| Incumbent re-elected.| nowrap |

|}

Wyoming

See also: List of United States representatives from Wyoming.

|-! | Teno Roncalio| | Democratic| 1964| | Incumbent retired to run for U.S. Senator.
New member elected.
Republican gain.| nowrap |

|}

See also

• 1966 United States elections
  • 1966 United States gubernatorial elections
  • 1966 United States Senate elections
• 89th United States Congress
• 90th United States Congress

Further reading

• "1966 Elections–A Major Republican Comeback." in CQ Almanac 1966 (22nd ed., 1967) pp 1387–88. online
• Anderson . Totton J. . Lee . Eugene C. . 1967 . The 1966 Election in California . The Western Political Quarterly . 20 . 2 . 535–554 . 10.2307/446081 . 0043-4078. 446081 ., plus articles on the other western states in the same issue
• Book: Congressional Quarterly . 1946 Congressional elections. 1998.
• Erikson . Robert J. . Malapportionment, Gerrymandering, and Party Fortunes in Congressional Elections . American Political Science Review . 66 . 1972 . 12–38. 1234–1245 . 10.2307/1957176 . 1957176 . 145806972 ., Focus on 1966
• Hathorn . Billy . The Frustration of Opportunity: Georgia Republicans and the Election of 1966 . . 1987–1988 . 31 . 4 . 37–52.
• McLay, Mark. "A High-Wire Crusade: Republicans and the War on Poverty, 1966." Journal of Policy History 31.3 (2019): 382–405.
• Sullivan . John L. . O'Connor . Robert E. . 1972 . Electoral Choice and Popular Control of Public Policy: The Case of the 1966 House Elections . The American Political Science Review . 66 . 4 . 1256–1268 . 10.2307/1957178 . 0003-0554. 1957178 . 147328869 .

Notes and References

1. Book: Heersink. Boris. Jenkins. Jeffrey A.. Republican Party Politics and the American South, 1865–1968. 19 March 2020 . 256. 978-1107158436.
2. Book: Martis, Kenneth C. . The Historical Atlas of Political Parties in the United States Congress, 1789–1989 . Prentice Hall College Div . 1989 . 0-02-920170-5.