There are 13 zip codes in Guernsey County, Ohio. The most populated is 43725, located in Cambridge. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4372519,662Cambridge
437234,412Byesville
437732,772Quaker City
437802,165Senecaville
437492,153Kimbolton
437321,701Cumberland
437781,511Salesville
437551,417Lore City
43722782Buffalo
43768469Old Washington
43750141Kipling
4373368Derwent
4373612Fairview

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