There are 5 zip codes in Atchison County, Missouri. The most populated is 64482, located in Rock Port. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
644822,084Rock Port
644911,652Tarkio
644461,070Fairfax
64498234Westboro
64496186Watson

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