| Election Name: | 1805 Pennsylvania gubernatorial election |
| Country: | Pennsylvania |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1802 Pennsylvania gubernatorial election |
| Previous Year: | 1802 |
| Next Election: | 1808 Pennsylvania gubernatorial election |
| Next Year: | 1808 |
| Image1: | Thomas McKean by Charles Willson Peale.jpg |
| Nominee1: | Thomas McKean |
| Party1: | Constitutionalist |
| Color1: | FF9955 |
| Alliance1: | Federalist Party |
| Popular Vote1: | 43,644 |
| Percentage1: | 53.1% |
| Party2: | Democratic-Republican Party |
| Nominee2: | Simon Snyder |
| Popular Vote2: | 38,483 |
| Percentage2: | 46.9% |
| Map Size: | 200px |
| Governor | |
| Before Election: | Thomas McKean |
| Before Party: | Constitutionalist |
| After Election: | Thomas McKean |
| After Party: | Constitutionalist |
The 1805 Pennsylvania gubernatorial election occurred on October 8, 1805. Incumbent governor Thomas McKean won a contentious election over the endorsed Democratic-Republican candidate, Speaker of the Pennsylvania House of Representatives Simon Snyder.
Although the Democratic-Republicans united behind the McKean ticket in each of the prior two election cycles, by 1805, the party had divided into moderate and radical wings. The former sought to balance the political power of the traditional elite and the lower classes; this group additionally supported liberal economic policies. The latter sought to directly increase political and economic opportunities for poor and working men. After the radicals took control of the state legislature under Snyder, they clashed with the moderate aligned McKean. Democratic-Republican newspapers were dominated by radical interests, and the press vociferously denounced McKean's support for strong executive and judicial power. The governor formed a working alliance with the Federalists called "the quids" and began to purge radicals from appointed offices. McKean ultimately won reelection by a six point margin.http://www.portal.state.pa.us/portal/server.pt/community/1790-1879/4283/thomas_mckean/444134