Jefferson County, Montana

6 ZIP codes · 1,657 sq mi of land · FIPS 30043

Population12,774
StateMontana
FIPS code30043
Time zoneMountain
Area code406
Land area1,657 sq mi
Center (lat, long)46.1242, -112.0594

Cities and towns (largest first)

BasinBoulderClancyJefferson CityCardwellWhitehall

ZIP codes in Jefferson County

59631 Basin59632 Boulder59634 Clancy59638 Jefferson City59721 Cardwell59759 Whitehall

Population: U.S. Census Bureau, ACS 5-year estimates, 2024.