| Election Name: | 1940 United States Senate election in Virginia |
| Country: | Virginia |
| Flag Year: | 1931 |
| Type: | presidential |
| Previous Election: | 1934 United States Senate election in Virginia |
| Previous Year: | 1934 |
| Next Election: | 1946 United States Senate election in Virginia |
| Next Year: | 1946 |
| Election Date: | November 5, 1940 |
| Image1: | Harry F. Byrd (cropped).jpg |
| Nominee1: | Harry F. Byrd Sr. |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 274,260 |
| Percentage1: | 93.32% |
| U.S. Senator | |
| Before Election: | Harry F. Byrd Sr. |
| Before Party: | Democratic Party (United States) |
| After Election: | Harry F. Byrd Sr. |
| After Party: | Democratic Party (United States) |
The 1940 United States Senate election in Virginia was held on November 5, 1940. Incumbent Senator Harry F. Byrd Sr. was re-elected to a second term (his third overall) after defeating Independent Hilliard Berstein.