| Election Name: | 1818 Ohio gubernatorial election |
| Country: | Ohio |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1816 Ohio gubernatorial election |
| Previous Year: | 1816 |
| Next Election: | 1820 Ohio gubernatorial election |
| Next Year: | 1820 |
| Election Date: | October 13, 1818 |
| Nominee1: | Ethan Allen Brown |
| Party1: | Democratic-Republican Party |
| Popular Vote1: | 30,194 |
| Percentage1: | 78.90% |
| Nominee2: | James Dunlap |
| Party2: | Democratic-Republican Party |
| Popular Vote2: | 8,075 |
| Percentage2: | 21.10% |
| Governor | |
| Before Election: | Thomas Worthington |
| Before Party: | Democratic-Republican Party |
| After Election: | Ethan Allen Brown |
| After Party: | Democratic-Republican Party |
The 1818 Ohio gubernatorial election was held on October 13, 1818.
Incumbent Democratic-Republican Governor Thomas Worthington did not run for re-election.[1]
Chief Judge of the Ohio Supreme Court Ethan Allen Brown defeated former member of the Ohio Legislature[2] James Dunlap.