There are 8 zip codes in Sullivan County, Missouri. The most populated is 63556, located in Milan. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
635563,380Milan
635441,071Green Castle
63545914Green City
64667345Newtown
64646314Humphreys
64645168Harris
6356066Pollock
6356658Winigan
showing: 8 rows

Zip Codes in Sullivan County, Missouri by Population (2024)