Valley County, Montana Cities (2025)

7 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Change
Density
Area (mi²)
Type
Glasgow13,1703,194-0.16%2,2591.40 City
St. Marie24693253.08%2022.90 CDP
Frazer33664200%2261.62 CDP
Nashua4290299-0.69%4110.70 Town
Hinsdale52452840.82%386.46 CDP
Fort Peck6232239-0.43%2600.89 Town
Opheim772740%3440.21 Town

Valley County Cities Summary

Largest City

Glasgow is the largest city in Valley County, with a population of 3,170.

Smallest City

Opheim is the smallest city in Valley County.

10 Largest Cities

There are 7 cities in Valley County, Montana.