| Election Name: | 1803 Connecticut gubernatorial election |
| Country: | Connecticut |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1802 Connecticut gubernatorial election |
| Previous Year: | 1802 |
| Next Election: | 1804 Connecticut gubernatorial election |
| Next Year: | 1804 |
| Election Date: | April 14, 1803 |
| Nominee1: | Jonathan Trumbull Jr. |
| Party1: | Federalist Party (United States) |
| Popular Vote1: | 14,375 |
| Percentage1: | 64.04% |
| Nominee2: | Ephraim Kirby |
| Party2: | Democratic-Republican Party (United States) |
| Popular Vote2: | 7,848 |
| Percentage2: | 34.96% |
| Governor | |
| Before Election: | Jonathan Trumbull Jr. |
| Before Party: | Federalist Party (United States) |
| After Election: | Jonathan Trumbull Jr. |
| After Party: | Federalist Party (United States) |
The 1803 Connecticut gubernatorial election took place on April 14, 1803. Incumbent Federalist Governor Jonathan Trumbull Jr. won re-election to a sixth full term, defeating Democratic-Republican candidate Ephraim Kirby in a re-match of the previous year's election.