ZIP Codes Box

Warren County, Illinois ZIP codes

9ZIP codes
9Cities and towns
16,337People in ZIP areas
309Area code

Warren County is in Illinois and the Central Time zone. ZIP codes don’t follow county lines exactly, so a ZIP code listed here can reach into a neighboring county.

All ZIP codes in Warren County

ZIP codeCityTypePopulationMedian income
61412AlexisStandard1,392$82,143
61417BerwickStandard182$105,724
61423CameronStandard638$78,594
61435GerlawStandard271–
61447KirkwoodStandard1,020$82,583
61453Little YorkStandard677$58,281
61462MonmouthStandard10,458$64,113
61473RosevilleStandard1,279$60,833
61478SmithshireStandard420$75,625

Cities and towns in Warren County

Area codes in Warren County

Questions

How many ZIP codes are in Warren County, IL?
Warren County has 9 ZIP codes.
What cities are in Warren County?
Warren County ZIP codes cover Alexis, Berwick, Cameron, Gerlaw, Kirkwood, Little York, Monmouth and Roseville and 1 other places.
What area code is Warren County, IL?
Warren County uses area code 309.
What time zone is Warren County in?
Warren County is in Central Time.

Other Illinois counties