| Election Name: | 1842 Ohio gubernatorial election |
| Country: | Ohio |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1840 Ohio gubernatorial election |
| Previous Year: | 1840 |
| Next Election: | 1844 Ohio gubernatorial election |
| Next Year: | 1844 |
| Election Date: | October 11, 1842 |
| Nominee1: | Wilson Shannon |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 119,774 |
| Percentage1: | 49.32% |
| Nominee2: | Thomas Corwin |
| Party2: | Whig Party (United States) |
| Popular Vote2: | 117,902 |
| Percentage2: | 48.55% |
| Map Size: | 230px |
| Governor | |
| Before Election: | Thomas Corwin |
| Before Party: | Whig Party (United States) |
| After Election: | Wilson Shannon |
| After Party: | Democratic Party (United States) |
The 1842 Ohio gubernatorial election was held on October 11, 1842.
Incumbent Whig Governor Thomas Corwin was defeated by Democratic nominee and former Governor Wilson Shannon.