Illinois County Map

This is an interactive Illinois county map with cities for context. Hover over the map to see the names. For more detail, zoom in. For more information, scroll down.

County Map of Illinois

The Land of Lincoln or the Pririe State has 102 counties and its capital is Springfield.

Illinois is a state in the Midwestern United States, also part of the Great Lakes region. Illinois is located in the heart of the country, bordered by several states and Lake Michigan.

The Land of Lincoln is the birthplace of Walt Disney, the skyscraper, and the home of America's tallest building, the Willis Tower (Formerly the Sears Tower.

Right infront of the Art Institute of Chicago is where Route 66 begins and also in Chicago is the World's Largest Public Library the Chicago Public Library.

Springfield was Lincoln's hometown for 20 years and Illinois was the firts state to ratify the 13 Amendment and abolish slavery.

Prominent Counties in Illinois

Illinois counties, contribute to its diverse economic, cultural, and geographic identity.

Among these, several counties stand out due to their population size, economic influence, and cultural significance.

Cook County is the most populous in Illinois and the second most populous in the United States, is anchored by Chicago, a cosmopolitan city known for its finance, healthcare, transportation, and museums. With over 5 million residents, Cook County is the state's epicenter for commerce, politics, and innovation.
DuPage County, west of Cook, is a thriving suburban hub. Known for its affluence and strong educational institutions, DuPage boasts a highly skilled workforce and a robust economy driven by technology, healthcare, and manufacturing.
Lake County, bordering Lake Michigan, blends suburban living with natural beauty, including forest preserves and lakefront access. Its county seat, Waukegan, is part of the Chicago metro area and supports a mix of residential, commercial, and industrial development.

Will County, one of the fastest-growing in the state, plays a vital role in logistics and transportation, thanks to its location at the intersection of several major interstates and rail lines. Joliet, the county seat, has evolved from an industrial city to a diversified urban center.
Kane County, anchored by Geneva, balances agriculture with suburban expansion. The Fox River Valley runs through its core, providing scenic views and economic activity linked to recreation and tourism.

Printable Map of Illinois Counties

These are the PDF files for the Illinois counties map in color and black and white.

List of Counties in Illinois

This table includes Illinois counties, and seats.

County	County Seat	Population	Area (sq mi)
Cook	Chicago	5,087,072	944
DuPage	Wheaton	921,213	327
Lake	Waukegan	708,760	443
Will	Joliet	700,728	837
Kane	Geneva	514,982	519
McHenry	Woodstock	312,800	603
Winnebago	Rockford	280,922	519
Madison	Edwardsville	262,752	716
St. Clair	Belleville	251,018	657
Champaign	Urbana	205,644	996
Sangamon	Springfield	193,491	868
Peoria	Peoria	177,513	618
McLean	Bloomington	170,441	1,183
Rock Island	Rock Island	141,236	427
Kendall	Yorkville	139,976	320
Tazewell	Pekin	129,541	646
LaSalle	Ottawa	108,309	1,135
Kankakee	Kankakee	105,940	676
DeKalb	Sycamore	100,288	631
Macon	Decatur	100,591	580
Vermilion	Danville	74,188	898
Adams	Quincy	64,109	855
Whiteside	Morrison	55,000	697
Jackson	Murphysboro	52,141	584
Boone	Belvidere	53,313	280
Grundy	Morris	53,578	418
Knox	Galesburg	48,411	716
Henry	Cambridge	48,448	822
Coles	Charleston	46,863	508
Macoupin	Carlinville	44,967	862
Stephenson	Freeport	44,000	565
Woodford	Eureka	38,664	543
Franklin	Benton	37,138	408
Marion	Salem	37,205	572
Jefferson	Mount Vernon	37,000	571
Clinton	Carlyle	36,000	474
Monroe	Waterloo	34,000	385
Livingston	Pontiac	35,320	1,043
Effingham	Effingham	34,331	478
Lee	Dixon	33,654	724
Christian	Taylorville	32,000	709
Fulton	Lewistown	32,541	865
Bureau	Princeton	32,486	869
Morgan	Jacksonville	31,000	568
Randolph	Chester	30,000	575
Montgomery	Hillsboro	29,000	703
Logan	Lincoln	27,590	618
McDonough	Macomb	27,000	589
Iroquois	Watseka	26,136	1,117
Saline	Harrisburg	24,000	379
Jo Daviess	Galena	22,000	600
Jersey	Jerseyville	21,000	369
Fayette	Vandalia	21,164	716
Shelby	Shelbyville	20,000	758
Perry	Pinckneyville	20,000	441
Douglas	Tuscola	19,629	416
Crawford	Robinson	18,300	443
Hancock	Carthage	17,186	793
Union	Jonesboro	17,000	413
Edgar	Paris	16,334	623
Warren	Monmouth	16,000	542
Bond	Greenville	16,576	380
Piatt	Monticello	16,000	439
Wayne	Fairfield	15,000	715
Richland	Olney	14,000	360
Mercer	Aledo	15,000	561
DeWitt	Clinton	15,365	397
Clark	Marshall	15,000	501
Carroll	Mount Carroll	15,000	445
Lawrence	Lawrenceville	14,813	372
Pike	Pittsfield	14,000	831
Moultrie	Sullivan	14,000	335
Massac	Metropolis	14,000	237
White	Carmi	14,000	495
Washington	Nashville	14,000	562
Ford	Paxton	13,250	485
Clay	Louisville	13,000	468
Johnson	Vienna	13,000	343
Mason	Havana	13,000	539
Cass	Virginia	13,000	375
Menard	Petersburg	13,000	314
Greene	Carrollton	11,543	543
Marshall	Lacon	12,000	386
Wabash	Mount Carmel	12,000	223
Cumberland	Toledo	10,261	345
Jasper	Newton	10,000	494
Hamilton	McLeansboro	7,911	434
Schuyler	Rushville	7,000	437
Henderson	Oquawka	6,088	378
Brown	Mount Sterling	6,307	305
Edwards	Albion	5,968	222
Putnam	Hennepin	5,561	160
Alexander	Cairo	4,594	236
Gallatin	Shawneetown	4,670	322
Calhoun	Hardin	4,224	253
Pope	Golconda	4,000	368
Hardin	Elizabethtown	3,569	177