| Election Name: | 1887 Boston mayoral election |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1886 Boston mayoral election |
| Previous Year: | 1886 |
| Election Date: | December 13, 1887 |
| Next Election: | 1888 Boston mayoral election |
| Next Year: | 1888 |
| Image1: | Hugh O'Brien 5210004 015 028 (3x4a).jpg |
| Candidate1: | Hugh O'Brien |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 26,636 |
| Percentage1: | 51.41% |
| Candidate2: | Thomas N. Hart |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 25,179 |
| Percentage2: | 48.59% |
| Mayor | |
| Before Election: | Hugh O'Brien |
| Before Party: | Democratic Party (United States) |
| After Election: | Hugh O'Brien |
| After Party: | Democratic Party (United States) |
The Boston mayoral election of 1887 saw the reelection of Hugh O'Brien (a Democrat to a fourth consecutive term, defeating Republican nominee Thomas N. Hart.
Incumbent mayor Hugh O'Brien was renominated by the Democratic Party. Thomas N. Hart was nominated by the Republican Party, and was also included on an independent ticket.[1]