Blaine County, Montana Cities (2025)

2 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Chinook11,1581,178-0.34%2,2141 City
Harlem2754768-0.4%1,8040 City

Blaine County Cities Summary

Largest City

Chinook is the largest city in Blaine County, with a population of 1,158.

Smallest City

Harlem is the smallest city in Blaine County, with a population of 754.

10 Largest Cities

There are 2 cities in Blaine County, Montana.

Location of Blaine County