| Election Name: | 1944 United States Senate election in California |
| Country: | California |
| Flag Image: | Flag of California (1924–1953).pngborder |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1938 United States Senate election in California |
| Previous Year: | 1938 |
| Next Election: | 1950 United States Senate election in California |
| Next Year: | 1950 |
| Election Date: | November 7, 1944 |
| Image1: | Washington, D.C., November 21, 1939 - A new informal photograph of Senator Sheridan Downey of California LCCN2016876632 (cropped 3x4).jpg |
| Nominee1: | Sheridan Downey |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,728,155 |
| Percentage1: | 52.29% |
| Nominee2: | Frederick F. Houser |
| Party2: | Republican Party (US) |
| Alliance2: | Prohibition Party (US) |
| Popular Vote2: | 1,576,553 |
| Percentage2: | 47.71% |
| U.S. Senator | |
| Before Election: | Sheridan Downey |
| Before Party: | Democratic Party (US) |
| After Election: | Sheridan Downey |
| After Party: | Democratic Party (US) |
The 1944 United States Senate election in California was held on November 7, 1944.
Incumbent Democratic Senator Sheridan Downey was re-elected to a second term in office over Republican Lieutenant Governor Frederick F. Houser.