9th Senatorial District
Chester County
Delaware County
- Chester Heights Borough
- Chester Township
- Concord Township
- Eddystone Borough
- Edgmont Township
- Lower Chichester Township
- Marcus Hook Borough
- Middletown Township
- Nether Providence Township
- Parkside Borough
- Rose Valley Borough
- Thornbury Township
- Trainer Borough
- Upland Borough
- Upper Chichester Township
