| Election Name: | 1942 Maryland gubernatorial election |
| Country: | Maryland |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1938 Maryland gubernatorial election |
| Previous Year: | 1938 |
| Next Election: | 1946 Maryland gubernatorial election |
| Next Year: | 1946 |
| Election Date: | November 3, 1942 |
| Image1: | File:Governor herbert oconor of maryland.jpg |
| Nominee1: | Herbert O'Conor |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 198,488 |
| Percentage1: | 52.55% |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 179,204 |
| Percentage2: | 47.45% |
| Map Size: | 280px |
| Governor | |
| Before Election: | Herbert O'Conor |
| Before Party: | Democratic Party (United States) |
| After Election: | Herbert O'Conor |
| After Party: | Democratic Party (United States) |
The 1942 Maryland gubernatorial election was held on November 3, 1942. Incumbent Democrat Herbert O'Conor defeated Republican nominee Theodore McKeldin with 52.55% of the vote.