| Election Name: | 1936 U.S. Senate Democratic primary in Florida |
| Country: | Florida |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1936 United States Senate special election in Florida (Class 1) |
| Previous Year: | 1936 (special) |
| Next Election: | 1946 United States Senate election in Florida |
| Next Year: | 1946 |
| Election Date: | May 28, 1940 |
| Image1: | Charlesoscarandrews.jpg |
| Nominee1: | Charles O. Andrews |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 312,293 |
| Percentage1: | 69.4% |
| Nominee2: | Jerry W. Carter |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 30.59 |
| Percentage2: | 30.6% |
| Map Size: | 280px |
| U.S. Senator | |
| Before Election: | Charles O. Andrews |
| Before Party: | Democratic Party (US) |
| After Election: | Charles O. Andrews |
| After Party: | Democratic Party (US) |
| Flag Year: | 1900 |
The 1940 United States Senate election in Florida was held on November 5, 1940.
Incumbent Senator Charles O. Andrews failed to achieve a majority in the May 7 primary election, but defeated Jerry W. Carter easily in a run-off on May 28. Andrews won the November general election without an opponent.
Incumbent Senator Charles O. Andrews was first elected in a special 1936 election to complete the unexpired term of Park Trammell.