There are 12 zip codes in Lake County, Montana. The most populated is 59860, located in Polson. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5986011,528Polson
599119,161Bigfork
598647,057Ronan
598653,899Saint Ignatius
598241,520Charlo
59910658Big Arm
59855376Pablo
59915357Elmo
59914342Dayton
59931269Rollins
59929215Proctor
59863173Ravalli

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