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_ |
|---|---|---|---|---|
| Sinnamahoning | 1 | Cameron County | 15861 |  |
| Sinnemahoning | 1 | Cameron County |  |  |
| Sinsheim | 1 | York County | 17362 |  |
| Siousca | 1 | Chester County |  |  |
| Sipes Mill | 1 | Fulton County | 17238 |  |
| Sipesville | 1 | Somerset County | 15561 |  |
| Sistersville | 1 | Armstrong County |  |  |
| Sitka | 1 | Fayette County |  |  |
| Siverly | 1 | Venango County |  |  |
| Six Mile Run | 1 | Bedford County | 16679 |  |
| Six Points | 1 | Butler County | 16049 |  |
| Sixtieth Street | 1 | Philadelphia County | 19139 |  |
| Sizerville | 1 | Cameron County | 15834 |  |