Blaine County, Montana Cities (2026)

2 cities

City
Rank
2026 Pop. ↓
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Chinook11,1541,178-0.35%2,2071 City
Harlem2751768-0.4%1,7970 City

Blaine County Cities Summary

Largest City

Chinook is the largest city in Blaine County, with a population of 1,154.

Smallest City

Harlem is the smallest city in Blaine County, with a population of 751.

10 Largest Cities

There are 2 cities in Blaine County, Montana.

Location of Blaine County