| Election Name: | 1805 Massachusetts gubernatorial election |
| Country: | Massachusetts |
| Type: | presidential |
| Previous Year: | 1804 |
| Previous Election: | 1804 Massachusetts gubernatorial election |
| Next Year: | 1806 |
| Next Election: | 1806 Massachusetts gubernatorial election |
| Ongoing: | No |
| Turnout: | 16.30% of population[1] (3.48) |
| Nominee1: | Caleb Strong |
| Party1: | Federalist Party (United States) |
| Popular Vote1: | 35,213 |
| Percentage1: | 50.89% |
| Nominee2: | James Sullivan |
| Party2: | Democratic-Republican Party (United States) |
| Popular Vote2: | 33,743 |
| Percentage2: | 48.77% |
| Map Size: | 250px |
| Governor | |
| Before Party: | Federalist Party (United States) |
| Before Election: | Caleb Strong |
| After Party: | Federalist Party (United States) |
| After Election: | Caleb Strong |
The 1805 Massachusetts gubernatorial election was held on April 2.
Federalist Governor Caleb Strong was re-elected to a sixth consecutive one-year term in office, defeating Republican James Sullivan for the second time, only narrowly achieving the majority necessary for election.