List of counties in Illinois

The U.S. state of Illinois is divided into 102 counties. The official abbreviation of Illinois is IL, the FIPS code is 17, the FIPS code of each county so always begins with 17, to which the national territory in the table three-digit number is appended.

The population figures given in the table are based, according to the United States Census Bureau on the census in 2010.

County (United States) Federal Information Processing Standards Jo Daviess County, Illinois Stephenson County, Illinois Winnebago County (Illinois) Boone County (Illinois) McHenry County (Illinois) Lake County (Illinois) Cook County (Illinois) DuPage County, Illinois Kane County (Illinois) DeKalb County (Illinois) Ogle County, Illinois Lee County (Illinois) Carroll County (Illinois) Whiteside County, Illinois Rock Island County, Illinois Mercer County (Illinois) Henry County (Illinois) Bureau County, Illinois Putnam County (Illinois) LaSalle County, Illinois Kendall County (Illinois) Grundy County (Illinois) Will County, Illinois Kankakee County, Illinois Iroquois County, Illinois Ford County (Illinois) Livingston County (Illinois) McLean County (Illinois) Woodford County (Illinois) Marshall County (Illinois) Stark County (Illinois) Peoria County, Illinois Tazewell County (Illinois) Fulton County (Illinois) Knox County (Illinois) Warren County (Illinois) Henderson County (Illinois) Hancock County (Illinois) McDonough County, Illinois Schuyler County (Illinois) Adams County (Illinois) Brown County (Illinois) Cass County (Illinois) Mason County (Illinois) Menard County (Illinois) Logan County (Illinois) DeWitt County (Illinois) Macon County (Illinois) Piatt County, Illinois Champaign County (Illinois) Vermilion County (Illinois) Edgar County, Illinois Douglas County (Illinois) Coles County, Illinois Moultrie County, Illinois Shelby County (Illinois) Montgomery County (Illinois) Christian County (Illinois) Sangamon County, Illinois Morgan County (Illinois) Scott County (Illinois) Pike County (Illinois) Calhoun County (Illinois) Greene County (Illinois) Jersey County, Illinois Macoupin County, Illinois Madison County (Illinois) Bond County, Illinois Fayette County (Illinois) Effingham County (Illinois) Jasper County (Illinois) Cumberland County (Illinois) Clark County (Illinois) Crawford County (Illinois) Lawrence County (Illinois) Richland County (Illinois) Clay County (Illinois) Marion County (Illinois) Clinton County (Illinois) St. Clair County (Illinois) Monroe County (Illinois) Randolph County (Illinois) Washington County (Illinois) Jefferson County (Illinois) Wayne County (Illinois) Edwards County (Illinois) Wabash County (Illinois) White County (Illinois) Hamilton County (Illinois) Franklin County (Illinois) Perry County (Illinois) Jackson County (Illinois) Williamson County (Illinois) Saline County (Illinois) Gallatin County (Illinois) Hardin County (Illinois) Pope County (Illinois) Johnson County (Illinois) Union County (Illinois) Alexander County (Illinois) Pulaski County (Illinois) Massac County, Illinois Quincy (Illinois) Cairo (Illinois) Illinois General Assembly Greenville (Illinois) Shadrach Bond List of Governors of Illinois Wilderness Road Kentucky Mount Sterling (Illinois) Princeton (Illinois) Hardin (Illinois) John C. Calhoun Mount Carroll, Illinois Virginia (Illinois) Lewis Cass Michigan Territory Urbana (Illinois) Champaign County (Ohio) Taylorville, Illinois Christian County (Kentucky) Marshall (Illinois) George Rogers Clark Northwest Territory Louisville (Illinois) Henry Clay Missouri Compromise Carlyle (Illinois) DeWitt Clinton List of Governors of New York Charleston (Illinois) Edward Coles Chicago Daniel Pope Cook Robinson (Illinois) Toledo (Illinois) Cumberland (Maryland) Cumberland River Sycamore (Illinois) Clinton (Illinois) Stephen A. Douglas Wheaton (Illinois) Paris (Illinois) Albion (Illinois) Ninian Edwards Effingham (Illinois) Vandalia (Illinois) Paxton (Illinois) Thomas Ford (politician) Benton (Illinois) Benjamin Franklin Lewistown (Illinois) Robert Fulton Shawneetown, Illinois Carrollton (Illinois) Nathanael Greene Morris (Illinois) Felix Grundy McLeansboro, Illinois Alexander Hamilton Carthage (Illinois) Governor of Massachusetts Elizabethtown (Illinois) Oquawka, Illinois Henderson County (Kentucky) Cambridge (Illinois) Patrick Henry Watseka, Illinois Murphysboro, Illinois Andrew Jackson Mount Vernon (Illinois) Thomas Jefferson Jerseyville, Illinois Galena (Illinois) Vienna (Illinois) Geneva (Illinois) Elias Kane Kankakee, Illinois Yorkville (Illinois) Amos Kendall Galesburg (Illinois) Henry Knox Ottawa (Illinois) Waukegan, Illinois Dixon (Illinois) Pontiac (Illinois) Edward Livingston Lincoln (Illinois) John A. Logan Decatur (Illinois) Nathaniel Macon Carlinville, Illinois Edwardsville (Illinois) James Madison Salem (Illinois) Francis Marion Lacon (Illinois) John Marshall George Mason Metropolis (Illinois) Woodstock (Illinois) Bloomington (Illinois) John McLean (Illinois politician) Aledo (Illinois) Waterloo (Illinois) James Monroe Richard Montgomery Daniel Morgan William Moultrie List of Governors of South Carolina South Carolina Oregon (Illinois) Peoria (Illinois) Oliver Hazard Perry Monticello (Illinois) Nathaniel Pope Mound City (Illinois) Hennepin (Illinois) Israel Putnam Chester (Illinois) Edmund Randolph Governor of Virginia Olney (Illinois) Richland County (Ohio) Rock Island (Illinois) Belleville (Illinois) Arthur St. Clair Harrisburg (Illinois) Springfield (Illinois) Sangamon River Rushville (Illinois) Winchester (Illinois) Shelbyville (Illinois) John Stark Freeport (Illinois) Pekin (Illinois) Littleton Waller Tazewell Jonesboro (Illinois) Danville (Illinois) Mount Carmel (Illinois) Wabash River Monmouth (Illinois) Nashville (Illinois) George Washington Anthony Wayne Carmi (Illinois) Morrison (Illinois) Joliet (Illinois) Marion (Illinois) Hugh Williamson Rockford (Illinois) Eureka (Illinois) List of counties in Alabama List of boroughs and census areas in Alaska List of counties in Arizona List of counties in Arkansas List of counties in Colorado List of counties in Connecticut List of counties in Delaware List of counties in Florida List of counties in Georgia List of counties in Idaho List of counties in Indiana List of counties in Iowa List of counties in California List of counties in Kansas List of counties in Kentucky List of counties in Maine List of counties in Maryland List of counties in Massachusetts List of counties in Michigan List of counties in Minnesota List of counties in Mississippi List of counties in Missouri List of counties in Nebraska List of counties in Nevada List of counties in New Hampshire List of counties in New Jersey List of counties in New Mexico List of counties in New York List of counties in North Carolina List of counties in North Dakota List of counties in Ohio List of counties in Oklahoma List of counties in Oregon List of counties in Pennsylvania List of counties in Rhode Island List of counties in South Carolina List of counties in South Dakota List of counties in Tennessee List of counties in Texas List of counties in Utah List of counties in Vermont List of counties in Virginia List of counties in Washington List of counties in West Virginia List of counties in Wisconsin List of counties in Wyoming

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