# 1866 New Hampshire gubernatorial election

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The 1866 New Hampshire gubernatorial election was held on 13 March 1866 in order to elect the governor of New Hampshire. Incumbent Republican governor Frederick Smyth won re-election against Democratic nominee John G. Sinclair.

## General election

On election day, 13 March 1866, incumbent Republican governor Frederick Smyth won re-election by a margin of 4,656 votes against his opponent Democratic nominee John G. Sinclair, thereby retaining Republican control over the office of governor. Smyth was sworn in for his second term on 5 June 1866.

### Results

New Hampshire gubernatorial election, 1866 :
| Party | Party | Candidate | Votes | % |
| | Republican | Frederick Smyth (incumbent) | 35,137 | 53.53 |
| | Democratic | John G. Sinclair | 30,481 | 46.44 |
| | | Scattering | 18 | 0.03 |
| Total votes | Total votes | Total votes | 65,636 | 100.00 |
| | Republican hold | Republican hold | Republican hold | Republican hold |