| Election Name: | 1950 United States Senate election in Washington |
| Country: | Washington |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1944 United States Senate election in Washington |
| Previous Year: | 1944 |
| Next Election: | 1956 United States Senate election in Washington |
| Next Year: | 1956 |
| Election Date: | November 7, 1950 |
| Nominee1: | Warren Magnuson |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 397,719 |
| Percentage1: | 53.40% |
| Nominee2: | W. Walter Williams |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 342,464 |
| Percentage2: | 45.98% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Election: | Warren Magnuson |
| Before Party: | Democratic Party (United States) |
| After Election: | Warren Magnuson |
| After Party: | Democratic Party (United States) |
The 1950 United States Senate election in Washington was held on November 7, 1950. Incumbent Democratic U.S. Senator Warren Magnuson won a second term in office, defeating Republican nominee W. Walter Williams.
The blanket primary was held on September 12, 1950.