There are 10 zip codes in Delaware County, Ohio. The most populated is 43015, located in Delaware. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4301557,745Delaware
4306545,067Powell
4303534,661Lewis Center
4308233,195Westerville
4307415,597Sunbury
4302114,295Galena
432406,968Columbus
430615,045Ostrander
430661,173Radnor
430320Kilbourne

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