The 1804 New Hampshire gubernatorial election took place on March 13, 1804. Incumbent Federalist Governor John Taylor Gilman won re-election to an eleventh term, defeating Democratic-Republican candidate, former Governor and U.S. Senator John Langdon in a re-match of the previous year's election.
 | |||||||||||||||||
| |||||||||||||||||
| |||||||||||||||||
| |||||||||||||||||
Results
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Federalist | John Taylor Gilman (incumbent) | 12,216 | 50.31% | ||
| Democratic-Republican | John Langdon | 12,039 | 49.58% | ||
| Scattering | 27 | 0.11% | |||
| Majority | 177 | 0.73% | |||
| Turnout | 24,282 | 100.00% | |||
| Federalist hold | Swing | ||||