There are 7 zip codes in Riley County, Kansas. The most populated is 66502, located in Manhattan. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6650244,813Manhattan
6650316,393Manhattan
665063,179Manhattan
665171,529Ogden
665311,425Riley
664491,083Leonardville
66554650Randolph
showing: 7 rows

Zip Codes in Riley County, Kansas by Population (2024)