There are 6 zip codes in Jefferson County, Montana. The most populated is 59634, located in Clancy. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
596345,255Clancy
597593,647Whitehall
596322,412Boulder
59638594Jefferson City
59721462Cardwell
59631371Basin
showing: 6 rows

Zip Codes in Jefferson County, Montana by Population (2024)