There are 14 zip codes in Stephenson County, Illinois. The most populated is 61032, located in Freeport. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6103229,359Freeport
610483,851Lena
610193,256Davis
610622,015Pearl City
610601,482Orangeville
610701,389Rock City
61018953Dakota
61039829German Valley
61013621Cedarville
61067604Ridott
61089575Winslow
61050357McConnell
61044235Kent
61027102Eleroy

Zip Codes in Stephenson County, Illinois by Population (2024)