| Election Name: | 1840 Connecticut gubernatorial election |
| Country: | Connecticut |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1839 Connecticut gubernatorial election |
| Previous Year: | 1839 |
| Next Election: | 1841 Connecticut gubernatorial election |
| Next Year: | 1841 |
| Election Date: | April 6, 1840 |
| Image1: | File:William_Wolcott_Ellsworth (3x4a).jpeg |
| Nominee1: | William W. Ellsworth |
| Party1: | Whig Party (United States) |
| Popular Vote1: | 29,870 |
| Percentage1: | 54.17% |
| Nominee2: | John M. Niles |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 25,270 |
| Percentage2: | 45.83% |
| Map Size: | 220px |
| Governor | |
| Before Election: | William W. Ellsworth |
| Before Party: | Whig Party (United States) |
| After Election: | William W. Ellsworth |
| After Party: | Whig Party (United States) |
The 1840 Connecticut gubernatorial election was held on April 6, 1840.[1] [2] It was a rematch of the 1839 Connecticut gubernatorial election. Incumbent governor and Whig nominee William W. Ellsworth was re-elected, defeating former senator and Democratic nominee John M. Niles with 54.17% of the vote.
After his loss, Niles would be appointed Postmaster General by President Martin Van Buren, serving from May 19, 1840, until the end of Van Buren's term, March 4, 1841.
Major party candidates