There are 12 zip codes in Richland County, Ohio. The most populated is 44903, located in Mansfield. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4490325,860Mansfield
4490616,890Mansfield
4490516,385Mansfield
4490715,163Mansfield
4490413,841Mansfield
4487513,835Shelby
448138,121Bellville
449025,549Mansfield
448223,365Butler
448783,146Shiloh
448432,686Lucas
449010Mansfield

Zip Codes in Richland County, Ohio by Population (2024)