- Adams
- Alexander
- Bond
- Boone
- Brown
- Bureau
- Calhoun
- Carroll
- Cass
- Champaign
- Christian
- Clark
- Clay
- Clinton
- Coles
- Cook
- Crawford
- Cumberland
- De Witt
- DeKalb
- Douglas
- DuPage
- Edgar
- Edwards
- Effingham
- Fayette
- Ford
- Franklin
- Fulton
- Gallatin
- Greene
- Grundy
- Hamilton
- Hancock
- Hardin
- Henderson
- Henry
- Iroquois
- Jackson
- Jasper
- Jefferson
- Jersey
- Jo Daviess
- Johnson
- Kane
- Kankakee
- Kendall
- Knox
- Lake
- LaSalle
- Lawrence
- Lee
- Livingston
- Logan
- Macon
- Macoupin
- Madison
- Marion
- Marshall
- Mason
- Massac
- McDonough
- McHenry
- McLean
- Menard
- Mercer
- Monroe
- Montgomery
- Morgan
- Moultrie
- Ogle
- Peoria
- Perry
- Piatt
- Pike
- Pope
- Pulaski
- Putnam
- Randolph
- Richland
- Rock Island
- Saline
- Sangamon
- Schuyler
- Scott
- Shelby
- St. Clair
- Stark
- Stephenson
- Tazewell
- Union
- Vermilion
- Wabash
- Warren
- Washington
- Wayne
- White
- Whiteside
- Will
- Williamson
- Winnebago
- Woodford
Counties by State
All the counties in Illinois (IL)
Click on one of the county names below, or use the search box to find the zip code information you need.
US Zip Code Information: