The 1803 New Hampshire gubernatorial election took place on March 8, 1803. Incumbent Federalist Governor John Taylor Gilman won re-election to a tenth term, defeating Democratic-Republican candidate, former Governor and United States Senator John Langdon in a re-match of the previous year's election.
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Results
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Federalist | John Taylor Gilman (incumbent) | 12,263 | 57.53% | ||
| Democratic-Republican | John Langdon | 9,011 | 42.27% | ||
| Scattering | 43 | 0.20% | |||
| Majority | 3,252 | 15.26% | |||
| Turnout | 21,317 | 100.00% | |||
| Federalist hold | Swing | ||||