| Election Name: | 1940 United States Senate election in Minnesota |
| Country: | Minnesota |
| Flag Year: | 1893 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1934 United States Senate election in Minnesota |
| Previous Year: | 1934 |
| Next Election: | 1946 United States Senate election in Minnesota |
| Next Year: | 1946 |
| Election Date: | November 5, 1940 |
| Image1: | Hshipstead.jpg |
| Nominee1: | Henrik Shipstead |
| Party1: | Republican Party of Minnesota |
| Popular Vote1: | 641,049 |
| Percentage1: | 53.01% |
| Party2: | Farmer–Labor Party |
| Popular Vote2: | 310,875 |
| Percentage2: | 25.71% |
| Image3: | John E. Regan.jpg |
| Nominee3: | John E. Regan |
| Party3: | Democratic Party of Minnesota |
| Popular Vote3: | 248,658 |
| Percentage3: | 20.56% |
| Map Size: | 260px |
| U.S. Senator | |
| Before Party: | Farmer–Labor Party |
| After Party: | Republican Party of Minnesota |
The 1940 United States Senate election in Minnesota took place on November 5, 1940. Incumbent U.S. Senator Henrik Shipstead defected to the Republican Party of Minnesota from the Farmer–Labor Party of Minnesota, and defeated former Governor Elmer Benson of the Farmer–Labor Party and John E. Regan of the Minnesota Democratic Party to win a fourth term.