There are 8 zip codes in Warren County, Illinois. The most populated is 61462, located in Monmouth. * 2024 populations estimated based on the latest ACS 5-year data.

CSV JSON

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Zip Code
Population
City
6146210,855Monmouth
614731,307Roseville
614471,133Kirkwood
61453691Little York
61423497Cameron
61478383Smithshire
61417237Berwick
61435155Gerlaw

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