2024 Pennsylvania Senate election
Elections for the Pennsylvania State Senate were held on, with 25 of 50 districts being contested. The term of office for those elected in 2024 will begin when the Senate convenes in January 2025. Pennsylvania State Senators are elected for four-year terms, with half of the seats up for election every two years. The election coincided with the 2024 U.S. presidential election, elections to the U.S. Senate, elections to the U.S. House of Representatives, and elections to the entirety of the Pennsylvania House of Representatives.
Republicans have controlled the chamber since the 1994 election.
Outgoing incumbents
Incumbents not seeking re-election
Democrats
- District 45: Jim Brewster retired.
Republicans
- District 15: John DiSanto retired.
- District 31: Mike Regan retired.
Primary elections
Republican primary
Source:General election
Close races
Six district races had winning margins of less than 15%:| District | Winner | Margin |
| District 5 | Republican | 0.82% |
| District 9 | Democratic | 12.06% |
| District 19 | Democratic | 13.02% |
| District 37 | Republican | 5.66% |
| District 45 | Democratic | 6.13% |
| District 49 | Republican | 8.56% |