Pennsylvania held special elections on November 3, 2015, deciding 1 legislative seat.
Legislature
- House (203 seats): 84 D, 119 R before the election, 84 D, 119 R after; control stayed with Republicans.
- Senate (50 seats): 20 D, 30 R before the election, 19 D, 30 R, 1 other or vacant after; control stayed with Republicans.
Legislative races
| Race | Winner | Others | Notes |
|---|---|---|---|
| Senate 37 | Guy Reschenthaler (R) 55.1% | Heather Arnet (D) 44.9% | Flipped D to R |