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_ |
|---|---|---|---|---|
| St. Joseph | 1 | Susquehanna County | 18818 |  |
| St. Lawrence | 1 | Berks County | 19606 |  |
| St. Lawrence | 1 | Cambria County | 16668 |  |
| St. Leonard | 1 | Bucks County | 18940 |  |
| St. Martins | 1 | Philadelphia County |  |  |
| St. Marys | 1 | Chester County |  |  |
| St. Marys | 1 | Elk County | 15857 |  |
| Saint Marys Seminary | 1 | Montgomery County |  |  |
| St. Michael | 1 | Cambria County | 15951 |  |
| St. Michael-Sidman | 1 | Cambria County |  |  |
| St. Nicholas | 1 | Schuylkill County | 17948 |  |
| St. Paul | 1 | Somerset County | 15552 |  |
| Saint Pauls Church | 1 | Philadelphia County |  |  |
| St. Peters | 1 | Chester County | 19470 |  |
| St. Petersburg | 1 | Clarion County | 16054 |  |
| St. Thomas | 1 | Franklin County | 17252 |  |
| St. Thomas Township | 1 | Franklin County |  |  |
| St. Vincent College | 1 | Westmoreland County | 15650 |  |