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_ |
|---|---|---|---|---|
| Sickler Hill | 1 | Luzerne County |  |  |
| Sickles Corner | 1 | Blair County | 16601 |  |
| Siddonsburg | 1 | York County | 17019 |  |
| Sidell | 1 | Clarion County |  |  |
| Sides | 1 | Indiana County |  |  |
| Sidley | 1 | Erie County |  |  |
| Sidman | 1 | Cambria County | 15955 |  |
| Sidney | 1 | Indiana County |  |  |
| Siegfried | 1 | Northampton County | 18067 |  |
| Sigel | 1 | Jefferson County | 15860 |  |
| Siglerville | 1 | Mifflin County | 17063 |  |
| Sigmund | 1 | Lehigh County | 18092 |  |
| Sigsbee | 1 | Greene County | 15338 |  |
| Siko | 1 | Wayne County |  |  |
| Siles | 1 | Bucks County |  |  |
| Silkworth | 1 | Luzerne County | 18621 |  |
| Silvara | 1 | Bradford County | 18623 |  |
| Silver Brook | 1 | Schuylkill County |  |  |
| Silver Creek | 1 | Schuylkill County | 17959 |  |
| Silver Ford Heights | 1 | Mifflin County | 17066 |  |
| Silver Lake | 1 | Bucks County | 18940 |  |