| Election Name: | 1938 United States Senate election in Pennsylvania |
| Country: | Pennsylvania |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1932 United States Senate election in Pennsylvania |
| Previous Year: | 1932 |
| Next Election: | 1944 United States Senate election in Pennsylvania |
| Next Year: | 1944 |
| Election Date: | November 8, 1938 |
| Image1: | File:DAVIS, JAMES. HONORABLE LCCN2016860969 (resized).jpg |
| Nominee1: | James J. Davis |
| Party1: | Republican Party (US) |
| Popular Vote1: | 2,086,931 |
| Percentage1: | 54.70% |
| Nominee2: | George Howard Earle III |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 1,694,367 |
| Percentage2: | 44.41% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Election: | James J. Davis |
| Before Party: | Republican Party (US) |
| After Election: | James J. Davis |
| After Party: | Republican Party (US) |
The 1938 United States Senate election in Pennsylvania was held on November 8, 1938. Incumbent Republican U.S. Senator James J. Davis was re-elected to a second term in office over Democratic Governor George Howard Earle III.