Chinook
- County:
- Blaine County
- County Seat:
- Yes
- Area (mi²):
- 0.523
- State:
- Montana
Chinook is a city located in Blaine County, Montana. Chinook has a 2026 population of 1,162. It is also the county seat of Blaine County. Chinook is currently growing at a rate of 0.26% annually but its population has decreased by -1.36% since the most recent census, which recorded a population of 1,178 in 2020.
The median household income in Chinook is $61,750 with a poverty rate of 8.37%. The median age in Chinook is 44.8 years: 48.1 years for males, and 40.4 years for females. For every 100 females there are 104.4 males.