| Election Name: | 1920 United States Senate election in Kentucky |
| Country: | Kentucky |
| Type: | presidential |
| Ongoing: | no |
| Previous Year: | 1914 |
| Next Election: | 1926 United States Senate election in Kentucky |
| Next Year: | 1926 |
| Election Date: | November 2, 1920 |
| Image1: | File:Richard Pretlow Ernst.jpg |
| Nominee1: | Richard P. Ernst |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 454,226 |
| Percentage1: | 50.3% |
| Nominee2: | J. C. W. Beckham |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 449,244 |
| Percentage2: | 49.7% |
| Map Size: | 300px |
| U.S. Senator | |
| Before Election: | John C. W. Beckham |
| Before Party: | Democratic Party (United States) |
| After Election: | Richard P. Ernst |
| After Party: | Republican Party (United States) |
The 1920 United States Senate election in Kentucky took place on November 2, 1920. Democratic Senator J. C. W. Beckham ran for re-election to a second term in office but was defeated by Republican attorney Richard P. Ernst.