| Election Name: | 1918 Ohio gubernatorial election |
| Country: | Ohio |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1916 Ohio gubernatorial election |
| Previous Year: | 1916 |
| Next Election: | 1920 Ohio gubernatorial election |
| Next Year: | 1920 |
| Election Date: | November 5, 1918 |
| Image1: | File:James M. Cox 1920.jpg |
| Nominee1: | James M. Cox |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 486,403 |
| Percentage1: | 50.62% |
| Nominee2: | Frank B. Willis |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 474,459 |
| Percentage2: | 49.38% |
| Governor | |
| Before Election: | James M. Cox |
| Before Party: | Democratic Party (United States) |
| After Election: | James M. Cox |
| After Party: | Democratic Party (United States) |
The 1918 Ohio gubernatorial election was held on November 5, 1918. Incumbent Democrat James M. Cox defeated Republican nominee Frank B. Willis in their third consecutive contest with 50.62% of the vote.