| Election Name: | 1790 Pennsylvania gubernatorial election |
| Country: | Pennsylvania |
| Type: | presidential |
| Election Date: | [1] |
| Ongoing: | no |
| Next Election: | 1793 Pennsylvania gubernatorial election |
| Next Year: | 1793 |
| Image1: | Thomas Mifflin.jpg |
| Candidate1: | Thomas Mifflin |
| Party1: | Democratic-Republican Party |
| Popular Vote1: | 27,974 |
| Percentage1: | 90.7% |
| Party2: | Federalist Party (United States) |
| Candidate2: | Arthur St. Clair |
| Popular Vote2: | 2,864 |
| Percentage2: | 9.3% |
| Map Size: | 200px |
| Governor | |
| Before Election: | Thomas Mifflin (as President of Pennsylvania) |
| Before Party: | Democratic-Republican Party |
| After Election: | Thomas Mifflin |
| After Party: | Democratic-Republican Party |
The 1790 Pennsylvania gubernatorial election was the first gubernatorial election after the establishment of the Commonwealth of Pennsylvania as a U.S. state. Thomas Mifflin, the incumbent President of the Supreme Executive Council of the Commonwealth of Pennsylvania was elected as the first Governor of Pennsylvania. He defeated Federalist candidate Arthur St. Clair, former Revolutionary War general and President of the Continental Congress, by a wide margin.