There are 15 zip codes in Clayton County, Iowa. The most populated is 52052, located in Guttenberg. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
520522,890Guttenberg
520762,150Strawberry Point
520431,860Elkader
520421,663Edgewood
521571,457McGregor
520351,255Colesburg
520491,132Garnavillo
52047801Farmersburg
52072792Saint Olaf
52156681Luana
52048307Garber
52158298Marquette
52044297Elkport
52077287Volga
5206692North Buena Vista

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