There are 16 zip codes in Polk County, Minnesota. The most populated is 56721, located in East Grand Forks. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5672110,905East Grand Forks
567169,048Crookston
565422,434Fosston
567622,407Warren
565401,916Fertile
565561,303Mcintosh
565351,242Erskine
56723827Fisher
56736650Mentor
56592527Winger
56684400Trail
56523395Climax
56722357Euclid
56646328Gully
56517279Beltrami
56568138Nielsville

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