Custer County, Idaho Cities (2025)

4 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Change
Density
Area (mi²)
Type
Challis19448941.07%4781.97 City
Mackay25044442.44%5820.87 City
Stanley31201170.84%2210.54 City
Clayton41090%1560.06 City

Custer County Cities Summary

Largest City

Challis is the largest city in Custer County, with a population of 944.

Smallest City

Clayton is the smallest city in Custer County.

10 Largest Cities

There are 4 cities in Custer County, Idaho.