| Election Name: | 1864 Boston mayoral election |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1863 Boston mayoral election |
| Previous Year: | 1863 |
| Election Date: | December 12, 1864 |
| Next Election: | 1865 Boston mayoral election |
| Next Year: | 1865 |
| Image1: | Frederic W. Lincoln Jr. 5210004 015 016 (3x4c).jpg |
| Candidate1: | Frederic W. Lincoln Jr. |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 6,877 |
| Percentage1: | 71.41% |
| Candidate2: | Thomas Coffin Amory |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 2,732 |
| Percentage2: | 28.37% |
| Mayor | |
| Before Election: | Frederic W. Lincoln Jr. |
| Before Party: | Republican Party (United States) |
| After Election: | Frederic W. Lincoln Jr. |
| After Party: | Republican Party (United States) |
The 1864 Boston mayoral election was held on December 12, 1864[1] and saw Frederic W. Lincoln Jr. reelected to a sixth overall term.
Mayor Frederic W. Lincoln Jr. was renominated by the Republican Party, which ran under the "Union Republican" banner amid the ongoing American Civil War. Lincoln's opponent, Thomas Coffin Amory, accepted the nomination of the Democratic Party in a letter that was read on his behalf to the December 2, 1864 meeting of the city's Democratic Ward and City Committee.[2]
The Boston Evening Transcript characterized Mayor Lincoln as a strong front-runner, writing on December 3, 1864, "there can be no doubt ever of the triumphant re-election of Mayor Lincoln and his associates on the Union Republican ticket."[3] After the election, the Boston Evening Transcript wrote that the election of Lincoln and the Union Republican nominees for other municipal offices had been a "foregone conclusion".[4]
The Boston Evening Transcript described the margins of the victory received Lincoln and his fellow Union Republican nominees for city offices were, "extraordinarily large". It also characterized the turnout for the election as, "small" when compared to that of the 1864 United States presidential election that was held in November.[4]