There are 14 zip codes in Lee County, Illinois. The most populated is 61021, located in Dixon. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6102122,593Dixon
613103,556Amboy
610311,745Franklin Grove
610061,460Ashton
613531,238Paw Paw
61367902Sublette
60530901Lee
60553666Steward
61318620Compton
61378493West Brooklyn
61042428Harmon
6132485Eldena
6105767Nachusa
613310Lee Center

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