| Election Name: | 1948 United States Senate election in Tennessee |
| Country: | Tennessee |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1942 United States Senate election in Tennessee |
| Previous Year: | 1942 |
| Next Election: | 1954 United States Senate election in Tennessee |
| Next Year: | 1954 |
| Election Date: | November 2, 1948 |
| Image1: | SenatorKefauver(D-TN).jpg |
| Nominee1: | Estes Kefauver |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 326,142 |
| Percentage1: | 65.33% |
| Nominee2: | B. Carroll Reece |
| Party2: | Republican Party (US) |
| Popular Vote2: | 166,947 |
| Percentage2: | 33.44% |
| Map Size: | 325px |
| Senator | |
| Before Election: | Tom Stewart |
| Before Party: | Democratic Party (US) |
| After Election: | Estes Kefauver |
| After Party: | Democratic Party (US) |
The 1948 United States Senate election in Tennessee took place on November 2, 1948, concurrently with the U.S. presidential election, as well as elections to the United States Senate in other states as well as elections to the United States House of Representatives and various state and local elections. Incumbent Democratic Senator Tom Stewart was defeated in the Democratic primary by Estes Kefauver.[1] In the general election, Kefauver defeated Republican Congressman B. Carroll Reece.