Petroleum County, Montana Cities (2025)

1 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Change
Density
Area (mi²)
Type
Winnett12231883.24%2191.02 Town

Petroleum County Cities Summary

Largest City

Winnett is the largest city in Petroleum County, with a population of 223.

Smallest City

Winnett is the smallest city in Petroleum County.

10 Largest Cities

There is 1 city in Petroleum County, Montana.