County · Montana · United States
Custer County ZIP codes
4 ZIP codes · 4 cities · FIPS 30017
Key facts
- State
- Montana (MT)
- FIPS code
- 30017
- Population
- 11,938
- Median household income
- $63,585
- Median age
- 42.6
- Land area
- 3,783.3 sq mi (9,798.7 km²)
- Population density
- 3 / sq mi
- Area codes
- 406
Cities and ZIP codes in Custer County (4)
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.