| Election Name: | 1802 New Hampshire gubernatorial election |
| Country: | New Hampshire |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1801 New Hampshire gubernatorial election |
| Previous Year: | 1801 |
| Next Election: | 1803 New Hampshire gubernatorial election |
| Next Year: | 1803 |
| Election Date: | March 9, 1802 |
| Nominee1: | John Taylor Gilman |
| Party1: | Federalist Party (United States) |
| Popular Vote1: | 10,377 |
| Percentage1: | 54.14% |
| Nominee2: | John Langdon |
| Party2: | Democratic-Republican Party (United States) |
| Popular Vote2: | 8,753 |
| Percentage2: | 45.67% |
| Map Size: | 150px |
| Governor | |
| Before Election: | John Taylor Gilman |
| Before Party: | Federalist Party (United States) |
| After Election: | John Taylor Gilman |
| After Party: | Federalist Party (United States) |
The 1802 New Hampshire gubernatorial election took place on March 9, 1802. Incumbent Federalist Governor John Taylor Gilman won re-election to a ninth term, defeating Democratic-Republican candidate, former Governor and U.S. Senator John Langdon.