
State Line
- County:
- Franklin County
- County Seat:
- No
- Area (mi²):
- 2.738
- State:
- Pennsylvania
State Line is a CDP located in Franklin County, Pennsylvania. State Line has a 2025 population of 3,566. State Line is currently growing at a rate of 1.62% annually and its population has increased by 0.51% since the most recent census, which recorded a population of 3,548 in 2020.
The average household income in State Line is $97,596 with a poverty rate of 8.41%. The median age in State Line is 33.6 years: 30.1 years for males, and 39.4 years for females.