State Line
- County:
- Kootenai County
- County Seat:
- No
- Area (mi²):
- 0.11
- State:
- Idaho
State Line is a city located in Kootenai County, Idaho. State Line has a 2026 population of 38. State Line is currently declining at a rate of 0% annually and its population has increased by 2.7% since the most recent census, which recorded a population of 37 in 2020.
The median household income in State Line is $48,750 with a poverty rate of 11.11%. The median age in State Line is 26.5 years: 18.5 years for males, and 31 years for females. For every 100 females there are 125.0 males.