| Election Name: | 1855 New Hampshire gubernatorial election |
| Country: | New Hampshire |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1854 New Hampshire gubernatorial election |
| Previous Year: | 1854 |
| Next Election: | 1856 New Hampshire gubernatorial election |
| Next Year: | 1856 |
| Election Date: | 13 March 1855 |
| Nominee1: | Ralph Metcalf |
| Party1: | Know Nothing |
| Popular Vote1: | 32,779 |
| Percentage1: | 50.71% |
| Nominee2: | Nathaniel B. Baker |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 27,050 |
| Percentage2: | 41.84% |
| Nominee3: | James Bell |
| Party3: | Whig Party (United States) |
| Popular Vote3: | 3,436 |
| Percentage3: | 5.32% |
| Map Size: | 245px |
| Governor | |
| Before Election: | Nathaniel B. Baker |
| Before Party: | Democratic Party (United States) |
| After Election: | Ralph Metcalf |
| After Party: | Know Nothing |
The 1855 New Hampshire gubernatorial election was held on 13 March 1855 in order to elect the Governor of New Hampshire. Know Nothing nominee and former member of the New Hampshire House of Representatives Ralph Metcalf defeated incumbent Democratic Governor Nathaniel B. Baker, Whig nominee and former member of the New Hampshire House of Representatives James Bell and Free Soil Party nominee Asa Fowler.[1]
On election day, 13 March 1855, Know Nothing nominee Ralph Metcalf won the election by a margin of 5,729 votes against his foremost opponent incumbent Democratic Governor Nathaniel B. Baker, thereby gaining Know Nothing control over the office of Governor. Metcalf was sworn in as the 25th Governor of New Hampshire on 7 June 1855.[2]