| Election Name: | 1839 Boston mayoral election |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1838 Boston mayoral election |
| Previous Year: | 1838 |
| Election Date: | December 9, 1839 |
| Next Election: | 1840 Boston mayoral election |
| Next Year: | 1840 |
| Image1: | Jonathan Chapman 5210004 015 008 (3x4).jpg |
| Candidate1: | Jonathan Chapman |
| Party1: | Whig Party (United States) |
| Popular Vote1: | 4,352 |
| Percentage1: | 58.27% |
| Candidate2: | Bradford Sumner |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 3,047 |
| Percentage2: | 40.80% |
| Mayor | |
| Before Election: | Samuel Atkins Eliot |
| Before Party: | Whig Party (United States) |
| After Election: | Jonathan Chapman |
| After Party: | Whig Party (United States) |
The 1839 Boston mayoral election saw the election of Whig Party nominee Jonathan Chapman. It was held on December 9, 1839. Whig Party incumbent Samuel Atkins Eliot was not a nominee for reelection.
Chapman was the Whig Party nominee. Bradford Sumner was the Democratic Party nominee. In the coinciding municipal elections, all Whig nominees for Boston Board of Aldermen won sizable victories.[1]