There are 9 zip codes in Jefferson County, Kansas. The most populated is 66512, located in Meriden. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
Population
City
665123,061Meriden
660662,803Oskaloosa
660542,717McLouth
660882,655Valley Falls
660732,444Perry
660702,230Ozawkie
660601,353Nortonville
660971,016Winchester
66429432Grantville

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