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_ |
|---|---|---|---|---|
| Sergeant | 1 | McKean County | 16735 |  |
| Sergeant Township | 1 | McKean County |  |  |
| Seven Fields | 1 | Butler County | 16046 |  |
| Seven Pines | 1 | Juniata County | 17082 |  |
| Seven Points | 1 | Northumberland County | 17801 |  |
| Seven Springs | 2 | Fayette County | 15622 |  |
| Seven Springs | 2 | Somerset County | 15622 |  |
| Seven Stars | 1 | Adams County | 17307 |  |
| Seven Stars | 1 | Chester County |  |  |
| Seven Stars | 1 | Huntingdon County |  |  |
| Seven Stars | 1 | Juniata County | 17062 |  |
| Seven Stars | 1 | Montgomery County |  |  |
| Seven Valleys | 1 | York County | 17360 |  |
| Seward | 1 | Westmoreland County | 15954 |  |
| Sewickley | 1 | Allegheny County | 15143 |  |
| Sewickley Heights | 1 | Allegheny County | 15143 |  |
| Sewickley Heights Township | 1 | Allegheny County |  |  |
| Sewickley Hills | 1 | Allegheny County | 15143 |  |