There are 16 zip codes in Dubuque County, Iowa. The most populated is 52001, located in Dubuque. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5200142,895Dubuque
5200217,871Dubuque
5200313,820Dubuque
520405,644Dyersville
520684,483Peosta
520333,417Cascade
520452,950Epworth
520462,663Farley
520731,496Sherrill
520321,407Bernard
520531,317Holy Cross
52039908Durango
52065824New Vienna
52078801Worthington
52079685Zwingle
52056222Luxemburg
showing: 16 rows

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