| Election Name: | 1934 United States Senate election in Ohio |
| Country: | Ohio |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1928 United States Senate election in Ohio |
| Previous Year: | 1928 |
| Next Election: | 1940 United States Senate election in Ohio |
| Next Year: | 1940 |
| Election Date: | November 6, 1934 |
| Image1: | File:Vic. Donahey LCCN2014717613.jpg |
| Nominee1: | Vic Donahey |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 1,276,206 |
| Percentage1: | 59.95% |
| Nominee2: | Simeon Fess |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 839,068 |
| Percentage2: | 39.41% |
| Map Size: | 200px |
| U.S. Senator | |
| Before Election: | Simeon Fess |
| Before Party: | Republican Party (United States) |
| After Election: | Vic Donahey |
| After Party: | Democratic Party (United States) |
The 1934 United States Senate election in Ohio took place on November 6, 1934. Incumbent Republican Senator Simeon Fess ran for a third term in office, but was defeated by Democratic former Governor of Ohio Vic Donahey in a landslide.