The 3rd Texas Legislature met from November 5, 1849 to December 3, 1850 in its regular session and two called sessions. All members of the House of Representatives and about half of the members of the Senate were elected in 1849.
Members of the Texas Senate for the Third Texas Legislature:
| District | Senator | Party | Took office | ||
|---|---|---|---|---|---|
| 1 | Matthias Ward | Democrat | align=center | 1849 | |
| 2 | Albert Hamilton Latimer | Democrat | align=center | 1849 | |
| 3 | Hart Hardin | Democrat | align=center | 1849 | |
| 4 | Albert Gallitan Walker | Democrat | align=center | 1849 | |
| Samuel R. Campbell | Democrat | align=center | 1850 | ||
| 5 | David Gage | Democrat | align=center | 1847 | |
| 6 | James F. Taylor | Democrat | align=center | 1849 | |
| 7 | Alfred M. Truitt | Democrat | align=center | 1849 | |
| 8 | John H. McRae | Democrat | align=center | 1847 | |
| 9 | John H. Moffitt | Democrat | align=center | 1849 | |
| 10 | Isaac Parker | Democrat | align=center | 1847 | |
| 11 | John B. Jones | Democrat | align=center | 1849 | |
| Elisha Marshall Pease | Democrat | align=center | 1849 | ||
| 12 | Isaac Wright Brashear | Democrat | align=center | 1846 | |
| 13 | Jesse Grimes | Democrat | align=center | 1846 | |
| 14 | Jerome Bonaparte "Polly" Robertson | Democrat | align=center | 1849 | |
| 15 | Wilds K. Cooke | Democrat | align=center | 1849 | |
| 16 | Edward Burleson | Democrat | align=center | 1846 | |
| 17 | David Young Portis | Democrat | align=center | 1849 | |
| 18 | Alexander H. Phillips | Democrat | align=center | 1846 | |
| 19 | Henry Lawrence Kinney | Democrat | align=center | 1846 | |
| 20 | David Campbell Van Derlip | Democrat | align=center | 1849 | |
| 21 | Henry Clay Davis | Democrat | align=center | 1849 | |
| 22 | Benjamin Rush Wallace | Democrat | align=center | 1846 |
Members of the House of Representatives for the Third Texas Legislature:
| District | Representative | Party | Term start | Term end | Counties Represented |
|---|---|---|---|---|---|
| 1 | Burrell Perry Smith | November 5, 1849 | November 3, 1851 | Red River | |
| 2 | Hardin Richard Runnels | November 5, 1849 | November 21, 1850 | Bowie, Red River | |
| 3 | James S. Gillet | November 5, 1849 | November 3, 1851 | Lamar | |
| 4 | Alfred Elkins Pace | November 5, 1849 | September 7, 1850 | Fannin | |
| Vacant | September 7, 1850 | November 18, 1850 | |||
| Harrison G. Hendricks | November 18, 1850 | November 3, 1851 | |||
| 5 | William M. Williams | November 5, 1849 | November 3, 1851 | Fannin, Lamar | |
| 6 | Samuel Bogart | November 5, 1849 | November 3, 1851 | Collin, Grayson | |
| 7 | William M. Cochran | November 5, 1849 | November 3, 1851 | Dallas, Denton | |
| 8 | Johnson Wren | November 5, 1849 | November 3, 1851 | Hopkins, Hunt | |
| 9 | Joshua F. Johnson | November 5, 1849 | November 3, 1851 | Titus | |
| 10 | Marion DeKalb Taylor | November 5, 1849 | November 3, 1851 | Cass | |
| 11 | Jeremiah M. Clough | November 5, 1849 | September 6, 1850 | Harrison | |
| Vacant | September 6, 1850 | November 18, 1850 | |||
| Louis Trezevant Wigfall | November 18, 1850 | November 3, 1851 | |||
| 12 | John H. McNairy | November 5, 1849 | July 22, 1850 | Harrison, Upshur | |
| Vacant | July 22, 1850 | November 18, 1850 | |||
| Joseph Taylor | November 18, 1850 | November 3, 1851 | |||
| 13 | Emory Lloyd | November 5, 1849 | November 3, 1851 | Rusk | |
| 14 | James K. Holland | November 5, 1849 | November 3, 1851 | Panola, Rusk | |
| 15 | Elisha Everett Lott | November 5, 1849 | November 3, 1851 | Henderson, Smith | |
| 16 | Benjamin F. Selman | November 5, 1849 | November 3, 1851 | Cherokee | |
| 17 | William N. Hardeman | November 5, 1849 | November 3, 1851 | Nacogdoches | |
| 18 | William G. W. Jowers | November 5, 1849 | November 3, 1851 | Anderson, Houston | |
| 19 | Nicholas Adolphus Sterne | November 5, 1849 | November 3, 1851 | Anderson, Angelina, Cherokee, Houston, Nacogdoches | |
| 20 | John Polk Jr. | November 5, 1849 | November 3, 1851 | San Augustine | |
| 21 | Josiah M. Smith | November 5, 1849 | November 3, 1851 | Shelby | |
| 22 | Edgar A. Whittlesey | November 5, 1849 | July 14, 1850 | Newton, Sabine | |
| Vacant | July 14, 1850 | August 16, 1850 | |||
| Joshua H. Speights | August 16, 1850 | November 3, 1851 | |||
| 23 | Napoleon Bonaparte Charlton | November 5, 1849 | November 3, 1851 | Jasper, Jefferson, Tyler | |
| 24 | William Fields | November 5, 1849 | November 3, 1851 | Liberty, Polk | |
| 25 | Benjamin Cromwell Franklin | November 5, 1849 | November 3, 1851 | Galveston | |
| Thomas Freeman McKinney | November 21, 1849 | November 3, 1851 | |||
| 26 | J. M. Reynolds | November 5, 1849 | November 3, 1851 | Harris | |
| John Shea | November 5, 1849 | November 3, 1851 | |||
| James W. Scott | November 5, 1849 | November 3, 1851 | |||
| 27 | Guy Morrison Bryan | November 5, 1849 | November 3, 1851 | Brazoria, Fort Bend | |
| 28 | David Catchings Dickson | November 5, 1849 | November 3, 1851 | Grimes, Montgomery | |
| 29 | Charles Gradison Keenan | November 5, 1849 | November 3, 1851 | Walker | |
| '30 | Elliott M. Millican | November 5, 1849 | July 15, 1850 | Brazos, Leon, Robertson | |
| Vacant | July 15, 1850 | November 18, 1850 | |||
| John Patrick | November 18, 1850 | November 3, 1851 | |||
| 31 | Edward H. Tarrant | November 5, 1849 | November 3, 1851 | Limestone, Navarro | |
| 32 | James Charles Wilson | November 5, 1849 | October 15, 1850 | Calhoun, Jackson, Matagorda, Wharton | |
| Vacant | October 15, 1850 | November 18, 1850 | |||
| Clark L. Owen | November 18, 1850 | November 3, 1851 | |||
| 33 | William Edmund Crump | November 5, 1849 | October 13, 1850 | Austin, Colorado | |
| Vacant | October 13, 1850 | November 18, 1850 | |||
| Zimri Hunt | November 18, 1850 | November 3, 1851 | |||
| 34 | William J. Russell | November 5, 1849 | November 3, 1851 | Fayette | |
| 35 | Benjamin E. Tarver | November 5, 1849 | July 21, 1850 | Washington | |
| Vacant | July 21, 1850 | August 12, 1850 | |||
| James E. Shepard | August 12, 1850 | November 3, 1851 | |||
| James G. Sheppard | August 12, 1850 | November 3, 1851 | |||
| 36 | James Shaw | November 5, 1849 | November 3, 1851 | Bastrop, Burleson | |
| 37 | George E. Burney | November 5, 1849 | November 3, 1851 | Milam, Williamson | |
| 38 | Thomas M. Hardeman | November 5, 1849 | November 3, 1851 | Caldwell, Hays, Travis | |
| 39 | Darwin M. Stapp | November 5, 1849 | November 3, 1851 | DeWitt, Lavaca, Victoria | |
| 40 | William H. Stewart | November 5, 1849 | November 3, 1851 | Comal, Gonzales, Guadalupe | |
| 41 | William G. Crump | November 5, 1849 | November 3, 1851 | Bexar | |
| Henry M. Lewis | November 5, 1849 | November 3, 1851 | |||
| 42 | Reuben E. Clements | November 5, 1849 | November 3, 1851 | Cameron, Nueces, Starr, Webb | |
| 43 | Hamilton Prioleau Bee | November 5, 1849 | November 3, 1851 | Cameron, Goliad, Nueces, Refugio, San Patricio, Starr, Webb | |
| 44 | Edward H. Winfield | November 5, 1849 | November 3, 1851 | Cameron, Starr, Webb | |
| District | Outgoing Senator | Reason for Vacancy | Successor | Date of Successor's Installation | |
|---|---|---|---|---|---|
| District 4 | Albert G. Walker | Senator Walker resigned March 30, 1850 | Samuel R. Campbell | August 12, 1850 | |
| District 6 | James F. Taylor | Senator Taylor resigned October 5, 1850. | James F. Taylor | November 18, 1850 | |
| District 11 | John B. Jones | In an election contest, Elisha M. Pease unseated Senator Jones on November 9, 1849. | Elisha M. Pease | November 9, 1849 |