✅Illinois County Map
Illinois consists of 102 counties, each with its own unique cities, towns, and cultural characteristics. Below is a detailed table of selected Illinois counties with county seats, established dates, area size, and notable towns.
✅Illinois Counties — Full List (102 counties)
Source: Wikipedia (List of counties in Illinois)| County | County Seat | Established | Area (sq mi) | Major Cities and Towns |
|---|---|---|---|---|
| Adams | Quincy | 1825 | 855 | Quincy, Camp Point, Mendon, Liberty |
| Alexander | Cairo | 1819 | 236 | Cairo, Olive Branch, Thebes |
| Bond | Greenville | 1817 | 380 | Greenville, Sorento, Coffeen |
| Boone | Belvidere | 1837 | 280 | Belvidere, Caledonia, Poplar Grove |
| Brown | Mount Sterling | 1839 | 305 | Mount Sterling, Mound Station |
| Bureau | Princeton | 1837 | 869 | Princeton, Spring Valley, LaSalle |
| Calhoun | Hardin | 1825 | 253 | Hardin, Brussels, Hamburg |
| Carroll | Mount Carroll | 1839 | 445 | Mount Carroll, Savanna, Thomson |
| Cass | Virginia | 1837 | 375 | Virginia, Beardstown, Arenzville |
| Champaign | Urbana | 1833 | 996 | Champaign, Urbana, Savoy, Rantoul |
| Christian | Taylorville | 1839 | 709 | Taylorville, Edinburg, Pana |
| Clark | Marshall | 1819 | 501 | Marshall, Martinsville |
| Clay | Louisville | 1824 | 468 | Louisville, Flora |
| Clinton | Carlyle | 1824 | 474 | Carlyle, Breese, Trenton |
| Coles | Charleston | 1830 | 508 | Charleston, Mattoon, Oakland |
| Cook | Chicago | 1831 | 1,635 | Chicago, Evanston, Oak Park, Cicero, Skokie |
| Crawford | Robinson | 1816 | 446 | Robinson, Oblong, Hutsonville |
| Cumberland | Toledo | 1823 | 347 | Toledo, Greenup |
| DeKalb | Sycamore | 1837 | 635 | DeKalb, Sycamore, Genoa, Sandwich |
| De Witt | Clinton | 1839 | 405 | Clinton, Farmer City |
| Douglas | Tuscola | 1859 | 417 | Tuscola, Arcola, Villa Grove |
| DuPage | Wheaton | 1839 | 336 | Naperville, Wheaton, Downers Grove, Lombard, Western Springs |
| Edgar | Paris | 1823 | 624 | Paris, Chrisman, Paris Landing |
| Edwards | Albion | 1814 | 223 | Albion, Grayville |
| Effingham | Effingham | 1831 | 480 | Effingham, Teutopolis |
| Fayette | Vandalia | 1821 | 725 | Vandalia, Ramsey, St. Elmo |
| Ford | Paxton | 1859 | 486 | Paxton, Gibson City |
| Franklin | Benton | 1818 | 431 | Benton, West Frankfort |
| Fulton | Lewistown | 1823 | 871 | Lewistown, Canton, Astoria |
| Gallatin | Equality | 1812 | 328 | Equality, Ridgway |
| Greene | Carrollton | 1821 | 546 | Carrollton, Greenfield, White Hall |
| Grundy | Morris | 1841 | 430 | Morris, Minooka, Joliet (part) |
| Hamilton | McLeansboro | 1821 | 436 | McLeansboro, Dahlgren |
| Hancock | Carthage | 1825 | 814 | Carthage, Hamilton, Nauvoo |
| Hardin | Elizabethtown | 1839 | 182 | Elizabethtown, Rosiclare |
| Henderson | Oquawka | 1841 | 395 | Oquawka, Gladstone |
| Henry | Cambridge | 1825 | 826 | Kewanee, Geneseo, Cambridge |
| Iroquois | Watseka | 1833 | 1,119 | Watseka, Gilman, Danforth |
| Jackson | Murphysboro | 1816 | 602 | Carbondale, Murphysboro, Makanda |
| Jasper | Newton | 1831 | 498 | Newton, Oblong |
| Jefferson | Mount Vernon | 1819 | 582 | Mount Vernon, Centralia (part), Woodlawn |
| Jersey | Jerseyville | 1839 | 377 | Jerseyville, Grafton, Elsah |
| Jo Daviess | Galena | 1827 | 619 | Galena, Stockton, Scales Mound |
| Johnson | Vienna | 1812 | 349 | Vienna, Goreville |
| Kane | Geneva | 1836 | 524 | Aurora, Elgin (part), Geneva, St. Charles |
| Kankakee | Kankakee | 1853 | 676 | Kankakee, Bradley, Bourbonnais |
| Kendall | Yorkville | 1841 | 322 | Oswego, Yorkville, Plano |
| Knox | Galesburg | 1825 | 814 | Galesburg, Abingdon, Knoxville |
| Lake | Waukegan | 1839 | 444 | Waukegan, Libertyville, Gurnee, Highland Park |
| LaSalle | Ottawa | 1831 | 1,135 | Ottawa, LaSalle, Peru, Peru |
| Lawrence | Lawrenceville | 1821 | 374 | Lawrenceville, St. Francisville |
| Lee | Dixon | 1839 | 729 | Dixon, Amboy, Steward |
| Livingston | Pontiac | 1837 | 1,162 | Pontiac, Streator (part), Dwight |
| Logan | Lincoln | 1839 | 619 | Lincoln, Broadwell |
| McDonough | Macomb | 1826 | 1,002 | Macomb, Bushnell, Bardolph |
| McHenry | Woodstock | 1836 | 611 | McHenry, Crystal Lake, Woodstock, Algonquin |
| McLean | Bloomington | 1830 | 1,186 | Bloomington, Normal, LeRoy |
| Macon | Decatur | 1829 | 586 | Decatur, Macon, Mt Zion |
| Macoupin | Carlinville | 1829 | 868 | Carlinville, Gillespie, Staunton |
| Madison | Edwardsville | 1812 | 741 | Alton, Edwardsville, Wood River |
| Marion | Salem | 1823 | 576 | Salem, Centralia (part) |
| Marshall | Lacon | 1839 | 386 | Lacon, Henry, Sparland |
| Mason | Havana | 1841 | 563 | Havana, Manito |
| Massac | Metropolis | 1843 | 242 | Metropolis, Brookport |
| Menard | Petersburg | 1839 | 315 | Petersburg |
| Mercer | Aledo | 1825 | 569 | Aledo, Keithsburg, New Boston |
| Monroe | Valmeyer | 1816 | 388 | Waterloo, Columbia, Valmeyer |
| Montgomery | Hillsboro | 1821 | 713 | Hillsboro, Litchfield, Nokomis |
| Morgan | Jacksonville | 1823 | 593 | Jacksonville, Waverly |
| Moultrie | Sullivan | 1843 | 344 | Sullivan, Bethany |
| Ogle | Oregon | 1836 | 763 | Oregon, Dixon, Rochelle |
| Peoria | Peoria | 1825 | 630 | Peoria, Pekin, East Peoria |
| Perry | Pinckneyville | 1827 | 422 | Pinckneyville, Du Quoin |
| Piatt | Monticello | 1841 | 439 | Monticello, Bement |
| Pike | Pittsfield | 1821 | 849 | Pittsfield, Griggsville, Pleasant Hill |
| Pope | Golconda | 1816 | 374 | Golconda, Eddyville |
| Pulaski | Mound City | 1843 | 203 | Mound City, Mound Station |
| Putnam | Hennepin | 1825 | 172 | Hennepin, Granville |
| Randolph | Chester | 1795 | 597 | Chester, Sparta, Red Bud |
| Richland | Olney | 1841 | 362 | Olney, Noble, West Liberty |
| Rock Island | Rock Island | 1831 | 451 | Rock Island, Moline, East Moline, Silvis |
| St. Clair | Belleville | 1790 | 674 | Belleville, East St. Louis, O’Fallon |
| Saline | Harrisburg | 1847 | 392 | Harrisburg, Eldorado |
| Sangamon | Springfield | 1821 | 877 | Springfield, Chatham, Rochester |
| Schuyler | Rushville | 1825 | 441 | Rushville, Jacksonville (part) |
| Scott | Kenton | 1839 | 253 | Kenton |
| Shelby | Shelbyville | 1825 | 768 | Shelbyville, Cowden |
| Stark | Wyoming | 1839 | 287 | Wyoming, Toulon |
| Stephenson | Freeport | 1837 | 565 | Freeport, Lena, Dakota |
| Tazewell | Pekin | 1827 | 658 | Pekin, Tremont, Morton |
| Union | Jonesboro | 1818 | 422 | Anna, Jonesboro |
| Vermilion | Danville | 1826 | 900 | Danville, Westville, Georgetown |
| Wabash | Mount Carmel | 1824 | 226 | Mount Carmel |
| Warren | Monmouth | 1825 | 557 | Monmouth, Kirkwood |
| Washington | Nashville | 1818 | 563 | Nashville, Ashley |
| Wayne | Wayne City | 1819 | 715 | Wayne City, Fairfield |
| White | Carmi | 1815 | 502 | Carmi, Crossville |
| Whiteside | Sterling | 1836 | 697 | Sterling, Morrison, Rock Falls |
| Will | Joliet | 1836 | 849 | Joliet, Bolingbrook, Plainfield, Romeoville |
| Williamson | Marion | 1839 | 444 | Marion, Carbondale (part) |
| Winnebago | Rockford | 1836 | 519 | Rockford, Loves Park, Belvidere |
| Woodford | Eureka | 1841 | 384 | Eureka, Metamora |
Notes: County establishment years and area figures are taken from the public county list (Wikipedia).
Geography and Nature
Illinois is characterized by its diverse landscapes, ranging from the fertile plains of the Midwest to rolling hills and river valleys. The mighty Mississippi River borders the state to the west, while Lake Michigan defines its northeastern edge. Forest preserves, state parks, and rivers provide countless opportunities for outdoor activities, from fishing and boating to hiking and birdwatching.
Cultural Richness
Illinois has a rich cultural and historical legacy. Chicago, the nation’s third-largest city, is a hub for architecture, music, and food, famous for its skyscrapers and deep-dish pizza. Beyond Chicago, small towns across the state highlight traditions of farming, industry, and local festivals. From Abraham Lincoln’s historic sites in Springfield to vibrant art scenes in Champaign-Urbana, Illinois showcases both history and modern creativity.
Popular Destinations
- Chicago: A global city known for Millennium Park, Navy Pier, Willis Tower, and its iconic skyline.
- Springfield: The state capital and home to Abraham Lincoln Presidential Library and Museum.
- Starved Rock State Park: Famous for its canyons, waterfalls, and scenic trails.
- Galena: A historic town with preserved 19th-century architecture and a charming Main Street.
- Shawnee National Forest: A natural gem offering rock formations, hiking, and camping.
Travel Tips
When traveling through Illinois, visitors should plan for diverse experiences, from bustling urban life to peaceful countryside. Public transit in Chicago is convenient, but renting a car is recommended for exploring smaller towns and natural areas. The best times to visit are spring and fall, when the weather is mild and outdoor activities are at their peak. Travelers should also explore local diners, county fairs, and regional specialties such as horseshoe sandwiches in Springfield. Illinois is much more than just Chicago—it’s a state filled with history, natural beauty, and vibrant communities. Whether you’re seeking cultural experiences, outdoor adventures, or a glimpse into America’s past, Illinois offers a well-rounded destination for all types of travelers.
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