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
City
Population
43725Cambridge19,662
43723Byesville4,412
43773Quaker City2,772
43780Senecaville2,165
43749Kimbolton2,153
43732Cumberland1,701
43778Salesville1,511
43755Lore City1,417
43722Buffalo782
43768Old Washington469
43750Kipling141
43733Derwent68
43736Fairview12

Guernsey County, Ohio Zip Codes by Population (2024)