List of places in Pennsylvania: Sa–Si List of places in Pennsylvania: Sa–Si List of places in Pennsylvania: Sa–Si

| Name_of_place | Number_of_counties | Principal_county | Lower_zip_code | Upper_zip_code_ |
|---|---|---|---|---|
| Seiberlingville | 1 | Lehigh County |  |  |
| Seidersville | 1 | Northampton County | 18015 |  |
| Seiple | 1 | Lehigh County |  |  |
| Seipstown | 1 | Lehigh County | 18031 |  |
| Seipsville | 1 | Northampton County |  |  |
| Seisholtzville | 1 | Berks County | 18062 |  |
| Seitzland | 1 | York County | 17327 |  |
| Seitzville | 1 | York County | 17360 |  |
| Seldersville | 1 | Cambria County |  |  |
| Selea | 1 | Huntingdon County | 17264 |  |
| Selinsgrove | 1 | Snyder County | 17870 |  |
| Selinsgrove Junction | 1 | Northumberland County |  |  |
| Selkirk | 1 | Warren County |  |  |
| Sell | 1 | Adams County |  |  |
| Sellersville | 1 | Bucks County | 18960 |  |
| Seltzer | 1 | Schuylkill County | 17974 |  |
| Seltzer City | 1 | Schuylkill County |  |  |
| Seminole | 1 | Armstrong County | 16253 |  |
| Seneca | 1 | Venango County | 16346 |  |
| Seneca Valley | 1 | Westmoreland County | 15642 |  |
| Sereno | 1 | Columbia County | 17846 |  |