| John James Gardner | |
| State1: | New Jersey |
| District1: | 2nd |
| Party: | Republican |
| Term1: | March 4, 1893 - March 3, 1913 |
| Preceded1: | James Buchanan |
| Succeeded1: | J. Thompson Baker |
| Office2: | Member of the New Jersey Senate from Atlantic County |
| Term Start2: | 1878 |
| Term End2: | 1893 |
| Predecessor2: | Hosea F. Madden |
| Successor2: | Samuel D. Hoffman |
| Term Start3: | 1868 |
| Term End3: | 1872 |
| Predecessor3: | Lemuel G. Eldridge |
| Successor3: | Charles Souder |
| Term Start4: | 1874 |
| Term End4: | 1875 |
| Predecessor4: | Charles Souder |
| Successor4: | Willard Wright |
| Birth Date: | 17 October 1845 |
| Birth Place: | Atlantic County, New Jersey |
| Death Place: | Indian Mills, New Jersey |
| Profession: | Politician |
| Alma Mater: | University of Michigan |
| Signature: | Signature of John James Gardner (1845–1921).png |
John James Gardner (October 17, 1845 - February 7, 1921) was an American Republican Party politician who represented New Jersey's 2nd congressional district in the United States House of Representatives for ten terms from 1893 to 1913, and was Mayor of Atlantic City, New Jersey.
At the time of his election to Congress, Gardner was the longest serving member in the history of the New Jersey Senate, having represented Atlantic County for five consecutive terms from 1878 to 1893.
Born in Atlantic County, Gardner attended the common schools and the University of Michigan Law School in 1866 and 1867. He served in the 6th New Jersey Volunteer Infantry from 1861 to 1865 and one year in the United States Veteran Volunteers. He engaged in the real estate and insurance business.
Gardner was elected alderman of Atlantic City in 1867. He served as Mayor of Atlantic City, New Jersey in 1868 to 1872 and again from 1874 to 1875. He served as member of the common council and coroner of Atlantic County in 1876. He was a member of the New Jersey Senate from 1878 to 1893, serving as its president in 1883. He engaged in agricultural pursuits. He was a delegate to the 1884 Republican National Convention.
Gardner was elected as a Republican to the Fifty-third and to the nine succeeding Congresses (March 4, 1893 - March 3, 1913). In April 1898, Gardner was among the six representatives who voted against declaring war on Spain. He served as chairman of the Committee on Labor. He was an unsuccessful candidate for reelection in 1912 to the Sixty-third Congress and resumed agricultural pursuits.
He died of heart disease at his farm in Indian Mills in Shamong Township, New Jersey on February 7, 1921,[1] and was interred in Atlantic City Cemetery in Pleasantville, New Jersey.