Blaine County, Montana Cities (2026)

City
Rank
2026 Pop. ↓
2020 Pop.
Annual Change
Density (/mi²)
Area (mi²)
Type
Chinook11,1491,179-0.52%2,1971 City
Harlem2746770-0.53%1,7850 City

Blaine County Cities Summary

Largest City

Chinook is the largest city in Blaine County, with a population of 1,149.

Smallest City

Harlem is the smallest city in Blaine County, with a population of 746.

10 Largest Cities

There are 2 cities in Blaine County, Montana.

Location of Blaine County