There are 11 zip codes in Koochiching County, Minnesota. The most populated is 56649, located in International Falls. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
566498,892International Falls
566531,243Littlefork
56661976Northome
56660306Mizpah
56669261Kabetogama
56668213Ranier
56627206Big Falls
56629191Birchdale
55772103Nett Lake
5665463Loman
566580Margie

Zip Codes in Koochiching County, Minnesota by Population (2024)