| Election Name: | 1948 United States Senate election in Montana |
| Country: | Montana |
| Flag Year: | 1905 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1942 United States Senate election in Montana |
| Previous Year: | 1942 |
| Next Election: | 1954 United States Senate election in Montana |
| Next Year: | 1954 |
| Election Date: | November 2, 1948 |
| Image1: | M001108.jpg |
| Nominee1: | James E. Murray |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 125,193 |
| Percentage1: | 56.65% |
| Nominee2: | Tom J. Davis |
| Party2: | Republican Party (US) |
| Popular Vote2: | 94,458 |
| Percentage2: | 42.74% |
| U.S. Senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
The 1948 United States Senate election in Montana took place on November 2, 1948. Incumbent United States Senator James E. Murray, who was first elected to the Senate in a special election in 1934 and was re-elected in 1936 and 1942, ran for re-election. After winning the Democratic primary, he faced Tom J. Davis, an attorney and the Republican nominee, in the general election. Following a narrow re-election in 1936, Murray significantly expanded his margin of victory and comfortably won re-election over Davis, resulting in him winning his fourth term and his third full term in the Senate.