| Election Name: | 1940 Maine gubernatorial election |
| Country: | Maine |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1938 Maine gubernatorial election |
| Previous Year: | 1938 |
| Next Election: | 1942 Maine gubernatorial election |
| Next Year: | 1942 |
| Election Date: | September 9, 1940 |
| Nominee1: | Sumner Sewall |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 162,719 |
| Percentage1: | 63.87% |
| Nominee2: | Fulton J. Redman |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 92,053 |
| Percentage2: | 36.13% |
| Map Size: | 300px |
| Governor | |
| Before Election: | Lewis O. Barrows |
| Before Party: | Republican Party (United States) |
| After Election: | Sumner Sewall |
| After Party: | Republican Party (United States) |
The 1940 Maine gubernatorial election took place on September 9, 1940. Incumbent Republican Governor Lewis O. Barrows was term limited and unable to seek re-election. Republican Maine Senate President Sumner Sewall faced off against Democrat Fulton J. Redman in the general election, beating him easily. This election was the last gubernatorial contest in Maine held prior to United States involvement in the second world war. Frederick G. Payne unsuccessfully ran for the Republican nomination.