There are 10 zip codes in Delaware County, Iowa. The most populated is 52057, located in Manchester. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
520578,082Manchester
520411,901Earlville
522371,623Hopkinton
520351,255Colesburg
522231,162Delhi
52330943Ryan
52038529Dundee
52050433Greeley
50654328Masonville
52036139Delaware
showing: 10 rows

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