Founded in 1847, Sullivan County is one of 67 counties in the state of Pennsylvania. Historically, Sullivan County was formed from parts of Lycoming County; attached to Lycoming until 1848. The city of Laporte is the county seat. With FIPS code of 113, Sullivan County has a population of 5,868 and area of 452 square miles (1,171 km2).
List of all cities in Sullivan County, PA alphabetically
| City/Town | Postal Code | Area Code |
| Beaver Lake, PA | 17758 | 570 |
| Beech Glen, PA | 17758 | 570 |
| Davidson, PA | 17758 | 570 |
| Dushore, PA | 18614 | 570 |
| Eagles Mere, PA | 17731 | 570 |
| Forksville, PA | 18616 | 570 |
| Fox, PA | 17768 | 570 |
| Hemlock Grove, PA | 17758 | 570 |
| Hillsgrove, PA | 18619 | 570 |
| Laporte, PA | 18626 | 570 |
| Lopez, PA | 18628 | 570 |
| Mildred, PA | 18632 | 570 |
| Muncy Valley, PA | 17758 | 570 |
| Nordmont, PA | 17758 | 570 |
| North Mountain, PA | 17758 | 570 |
| Shunk, PA | 17768 | 570 |
| Sonestown, PA | 17758 | 570 |
| Strawbridge, PA | 17758 | 570 |
| Wheelerville, PA | 17768 | 570 |