
State Line City
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 0.139
- State:
- Indiana
State Line City is a town located in Warren County, Indiana. State Line City has a 2025 population of 123. State Line City is currently declining at a rate of 0% annually and its population has increased by 0.82% since the most recent census, which recorded a population of 122 in 2020.
The average household income in State Line City is $61,055 with a poverty rate of 8.33%. The median age in State Line City is 54.5 years: 56.8 years for males, and 39.5 years for females.