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
565401,916Fertile
565561,303Mcintosh
565351,242Erskine
56723827Fisher
56736650Mentor
56651618Lengby
56592527Winger
56684400Trail
56523395Climax
56722357Euclid
56646328Gully
56517279Beltrami
56568138Nielsville
showing: 16 rows

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