There are 5 zip codes in Nicollet County, Minnesota. The most populated is 56003, located in Mankato. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5600315,360Mankato
5608214,544Saint Peter
560741,716Nicollet
560211,091Courtland
560541,005Lafayette

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