About Illinois
Illinois is the transportation crossroads of the United States. With one of the world's two busiest airports, the dominant railroad hub, one of the largest interstate highway systems, and a major inland shipping route, the state takes good advantage of its central position.

Located between the Mississippi River and the Great Lakes, Illinois was a mixture of woodland, prairie, and savannah before it was settled in the 19th Century. Although still called the Prairie State, almost all of the prairie has been replaced by farmland and urban areas. Outside of the Chicago Metro Area the state includes vast fields of corn and soybeans. The topography is mainly flat except for bluffs on the Illinois and Mississippi Rivers and the small "Illinois Ozarks" near the southern tip.

Chicago is far and away the largest city in Illinois, and its urban area holds over half of the state's population. The state also borders the city of St. Louis, and includes much of its metropolitan area. Major secondary cities are Rockford, Peoria, and Springfield.

Population
12,901,563

Counties in State
Adams County, Alexander County, Bond County, Boone County, Brown County, Bureau County, Calhoun County, Carroll County, Cass County, Champaign County, Christian County, Clark County, Clay County, Clinton County, Coles County, Cook County, Crawford County, Cumberland County, DeKalb County, De Witt County, Douglas County, DuPage County, Edgar County, Edwards County, Effingham County, Fayette County, Ford County, Franklin County, Fulton County, Gallatin County, Greene County, Grundy County, Hamilton County, Hancock County, Hardin County, Henderson County, Henry County, Iroquois County, Jackson County, Jasper County, Jefferson County, Jersey County, Jo Daviess County, Johnson County, Kane County, Kankakee County, Kendall County, Knox County, Lake County, LaSalle County, Lawrence County, Lee County, Livingston County, Logan County, Macon County, Macoupin County, Madison County, Marion County, Marshall County, Mason County, Massac County, McDonough County, McHenry County, McLean County, Menard County, Mercer County, Monroe County, Montgomery County, Morgan County, Moultrie County, Ogle County, Peoria County, Perry County, Piatt County, Pike County, Pope County, Pulaski County, Putnam County, Randolph County, Richland County, Rock Island County, Saline County, Sangamon County, Schuyler County, Scott County, Shelby County, Stark County, St. Clair County, Stephenson County, Tazewell County, Union County, Vermilion County, Wabash County, Warren County, Washington County, Wayne County, White County, Whiteside County, Will County, Williamson County, Winnebago County, Woodford County.

Cities in State
Abbott Park, Abingdon, Adair, Addieville, Addison, Adrian, Akin, Albany, Albers, Albion, Alden, Aledo, Alexander, Alexis, Algonquin, Alhambra, Allendale, Allerton, Alma, Alorton, Alpha, Alsey, Alsip, Altamont, Alton, Altona, Alto Pass, Alvin, Amboy, Anchor, Ancona, Andalusia, Andover, Anna, Annapolis, Annawan, Antioch, Apple River, Arcola, Arenzville, Argenta, Argonne, Arlington, Arlington Heights, Armington, Armstrong, Aroma Park, Arrowsmith, Arthur, Ashkum, Ashland, Ashley, Ashmore, Ashton, Assumption, Astoria, Athens, Atkinson, Atlanta, Atwater, Atwood, Auburn, Augusta, Aurora, Ava, Aviston, Avon, Baileyville, Baldwin, Bannockburn, Bardolph, Barnhill, Barrington, Barrington Hills, Barry, Barstow, Bartelso, Bartlett, Bartonville, Basco, Batavia, Batchtown, Bath, Baylis, Beardstown, Beason, Beaverville, Beckemeyer, Bedford Park, Beecher, Beecher City, Belknap, Belle Rive, Belleville, Bellflower, Bellmont, Bellwood, Belvidere, Bement, Benld, Bensenville, Benson, Benton, Berkeley, Berwick, Berwyn, Bethalto, Bethany, Biggsville, Big Rock, Bingham, Birds, Bishop Hill, Bismarck, Blackstone, Blandinsville, Bloomingdale, Bloomington, Blue Island, Blue Mound, Bluffs, Bluff Springs, Bluford, Boles, Bolingbrook, Bondville, Bone Gap, Bonfield, Bonnie, Boody, Bourbonnais, Bowen, Braceville, Bradford, Bradley, Braidwood, Breese, Bridgeport, Bridgeview, Brighton, Brimfield, Bristol, Broadlands, Broadview, Brocton, Brookfield, Brookport, Broughton, Browning, Browns, Brownstown, Brussels, Bryant, Buckingham, Buckley, Buckner, Buda, Buffalo, Buffalo Grove, Buffalo Prairie, Bulpitt, Buncombe, Bunker Hill, Burbank, Bureau, Burlington, Burnham, Burnside, Burnt Prairie, Burr Ridge, Bushnell, Butler, Byron, Cabery, Cache, Cahokia, Cairo, Caledonia, Calhoun, Calumet City, Calumet Park, Camargo, Cambria, Cambridge, Camden, Cameron, Campbell Hill, Camp Grove, Camp Point, Campus, Canton, Cantrall, Capron, Carbon Cliff, Carbondale, Carlinville, Carlock, Carlyle, Carman, Carmi, Carol Stream, Carpentersville, Carrier Mills, Carrollton, Carterville, Carthage, Cary, Casey, Caseyville, Castleton, Catlin, Cave In Rock, Cedar Point, Cedarville, Centralia, Centreville, Cerro Gordo, Chadwick, Chambersburg, Champaign, Chana, Chandlerville, Channahon, Chapin, Charleston, Chatham, Chatsworth, Chebanse, Chenoa, Cherry, Cherry Valley, Chester, Chesterfield, Chestnut, Chicago, Chicago Heights, Chicago Ridge, Chillicothe, Chrisman, Christopher, Cicero, Cisco, Cisne, Cissna Park, Clare, Claremont, Clarendon Hills, Clay City, Clayton, Claytonville, Clifton, Clinton, Coal City, Coal Valley, Coatsburg, Cobden, Coello, Coffeen, Colchester, Coleta, Colfax, Collinsville, Collison, Colona, Colp, Columbia, Colusa, Compton, Concord, Congerville, Cooksville, Cordova, Cornell, Cornland, Cortland, Cottage Hills, Coulterville, Country Club Hills, Countryside, Cowden, Creal Springs, Crescent City, Creston, Crestwood, Crete, Creve Coeur, Cropsey, Crossville, Crystal Lake, Cuba, Cullom, Cutler, Cypress, Dahinda, Dahlgren, Dakota, Dale, Dallas City, Dalton City, Dalzell, Dana, Danforth, Danvers, Danville, Darien, Davis, Davis Junction, Dawson, Decatur, Deer Creek, Deerfield, Deer Grove, DeKalb, De Land, Delavan, Dennison, Depue, De Soto, Des Plaines, Dewey, Dewitt, Dieterich, Divernon, Dix, Dixon, Dolton, Dongola, Donnellson, Donovan, Dorsey, Dover, Dow, Dowell, Downers Grove, Downs, Du Bois, Dundas, Dundee, Dunfermline, Dunlap, Dupo, Du Quoin, Durand, Dwight, Eagarville, Earlville, East Alton, East Carondelet, East Dubuque, East Galesburg, East Lynn, East Moline, Easton, East Peoria, East St. Louis, Eddyville, Edelstein, Edgewood, Edinburg, Edwards, Edwardsville, Effingham, Elburn, Eldena, Eldorado, Eldred, Eleroy, Elgin, Elizabeth, Elizabethtown, Elk Grove Village, Elkhart, Elkville, Ellery, Elliott, Ellis Grove, Ellisville, Ellsworth, Elmhurst, Elmwood, Elmwood Park, El Paso, Elsah, Elvaston, Elwin, Elwood, Emden, Emington, Emma, Energy, Enfield, Equality, Erie, Esmond, Essex, Eureka, Evanston, Evansville, Evergreen Park, Ewing, Fairbury, Fairfield, Fairmont City, Fairmount, Fairview, Fairview Heights, Farina, Farmer City, Farmersville, Farmington, Fenton, Ferris, Fiatt, Fidelity, Fieldon, Fillmore, Findlay, Fisher, Fithian, Flanagan, Flat Rock, Flora, Florence, Flossmoor, Foosland, Forest City, Forest Park, Forrest, Forreston, Forsyth, Fort Sheridan, Fowler, Fox Lake, Fox River Grove, Frankfort, Frankfort Heights, Franklin, Franklin Grove, Franklin Park, Frederick, Freeburg, Freeman Spur, Freeport, Fulton, Fults, Galatia, Galena, Galesburg, Galt, Galva, Garden Prairie, Gardner, Gays, Geff, Geneseo, Geneva, Genoa, Georgetown, Gerlaw, Germantown, German Valley, Gibson City, Gifford, Gilberts, Gillespie, Gilman, Gilson, Girard, Gladstone, Glasford, Glenarm, Glen Carbon, Glencoe, Glendale Heights, Glen Ellyn, Glenview, Glenwood, Godfrey, Golconda, Golden, Golden Eagle, Golden Gate, Golf, Goodfield, Good Hope, Goodwine, Goreville, Gorham, Grafton, Grand Chain, Grand Ridge, Grand Tower, Granite City, Grant Park, Grantsburg, Granville, Graymont, Grayslake, Grayville, Great Lakes, Greenfield, Greenup, Green Valley, Greenview, Greenville, Gridley, Griggsville, Groveland, Gurnee, Hagarstown, Hamburg, Hamel, Hamilton, Hamletsburg, Hammond, Hampshire, Hampton, Hanna City, Hanover, Hardin, Harmon, Harrisburg, Harristown, Hartford, Hartsburg, Harvard, Harvel, Harvey, Harwood Heights, Havana, Hazel Crest, Hebron, Hecker, Henderson, Hennepin, Henning, Henry, Herald, Herod, Herrick, Herrin, Herscher, Hettick, Heyworth, Hickory Hills, Hidalgo, Highland, Highland Park, Highwood, Hillsboro, Hillsdale, Hillside, Hillview, Hinckley, Hindsboro, Hines, Hinsdale, Hodgkins, Hoffman, Hoffman Estates, Holcomb, Homer, Homer Glen, Hometown, Homewood, Hoopeston, Hooppole, Hopedale, Hopkins Park, Hoyleton, Hudson, Huey, Humboldt, Hume, Huntley, Huntsville, Hurst, Hutsonville, Illinois City, Illiopolis, Ina, Indianola, Industry, Ingleside, Ingraham, Iola, Ipava, Iroquois, Irving, Irvington, Island Lake, Itasca, Iuka, Ivesdale, Jacksonville, Jacob, Janesville, Jerseyville, Jewett, Johnsonville, Johnston City, Joliet, Jonesboro, Joppa, Joy, Junction, Justice, Kampsville, Kane, Kaneville, Kankakee, Kansas, Karbers Ridge, Karnak, Kasbeer, Keenes, Keensburg, Keithsburg, Kell, Kempton, Kenilworth, Kenney, Kent, Kewanee, Keyesport, Kilbourne, Kincaid, Kinderhook, Kingston, Kingston Mines, Kinmundy, Kinsman, Kirkland, Kirkwood, Knoxville, Lacon, Ladd, La Fayette, Lafox, La Grange, La Grange Park, La Harpe, Lake Bluff, Lake Forest, Lake Fork, Lake in the Hills, Lake Villa, Lakewood, Lake Zurich, La Moille, Lanark, Lancaster, Lane, Lansing, La Place, La Prairie, La Rose, LaSalle, Latham, Laura, Lawndale, Lawrenceville, Leaf River, Lebanon, Lee, Lee Center, Leland, Lemont, Lena, Lenzburg, Leonore, Lerna, Le Roy, Lewistown, Lexington, Liberty, Libertyville, Lima, Lincoln, Lincolnshire, Lincoln's New Salem, Lincolnwood, Lindenwood, Lisle, Litchfield, Literberry, Littleton, Little York, Liverpool, Livingston, Loami, Lockport, Loda, Logan, Lomax, Lombard, London Mills, Long Grove, Long Point, Longview, Loogootee, Loraine, Lostant, Louisville, Lovejoy, Loves Park, Lovington, Lowder, Lowpoint, Ludlow, Lyndon, Lynn Center, Lyons, Macedonia, Machesney Park, Mackinaw, Macomb, Macon, Madison, Maeystown, Magnolia, Mahomet, Makanda, Malden, Malta, Manchester, Manhattan, Manito, Manlius, Mansfield, Manteno, Maple Park, Mapleton, Maquon, Marengo, Marietta, Marine, Marion, Marissa, Mark, Maroa, Marseilles, Marshall, Martinsville, Martinton, Maryville, Mascoutah, Mason, Mason City, Matherville, Matteson, Mattoon, Maunie, Maywood, Mazon, Mc Clure, Mc Connell, McCook, McHenry, Mc Lean, McLeansboro, Mc Nabb, Mechanicsburg, Media, Medora, Melrose Park, Melvin, Menard, Mendon, Mendota, Meredosia, Merna, Merrionette Park, Metamora, Metcalf, Metropolis, Michael, Middletown, Midlothian, Milan, Milford, Millbrook, Millcreek, Milledgeville, Miller City, Millington, Mill Shoals, Millstadt, Milmine, Milton, Mineral, Minier, Minonk, Minooka, Mode, Modesto, Modoc, Mokena, Moline, Momence, Monee, Monmouth, Monroe Center, Montgomery, Monticello, Montrose, Mooseheart, Moro Township, Morris, Morrison, Morrisonville, Morton, Morton Grove, Mossville, Mound City, Mounds, Mount Auburn, Mount Carmel, Mount Carroll, Mount Erie, Mount Morris, Mount Olive, Mount Prospect, Mount Pulaski, Mount Sterling, Mount Vernon, Moweaqua, Mozier, Mt Zion, Muddy, Mulberry Grove, Mulkeytown, Muncie, Mundelein, Murdock, Murphysboro, Murrayville, Nachusa, Naperville, Nashville, Nason, Nauvoo, Nebo, Nelson, Neoga, Neponset, Newark, New Athens, New Baden, New Bedford, New Berlin, New Boston, New Burnside, New Canton, New Douglas, New Haven, New Holland, New Lenox, Newman, New Memphis, New Salem, Newton, New Windsor, Niantic, Niles, Nilwood, Niota, Noble, Nokomis, Nora, Normal, Norridge, Norris, Norris City, North Aurora, Northbrook, North Chicago, Northfield, North Henderson, Northlake, Oak Brook, Oakbrook Terrace, Oakdale, Oakford, Oak Forest, Oakland, Oak Lawn, Oakley, Oak Park, Oakwood, Oakwood Hills, Oblong, Oconee, Odell, Odin, O'Fallon, Ogden, Oglesby, Ohio, Ohlman, Okawville, Olive Branch, Olmsted, Olney, Olympia Fields, Omaha, Onarga, Oneida, Opdyke, Opheim, Oquawka, Orangeville, Oraville, Oreana, Oregon, Orient, Orion, Orland Park, Osco, Oswego, Ottawa, Owaneco, Ozark, Palatine, Palestine, Palmer, Palmyra, Paloma, Palos Heights, Palos Hills, Palos Park, Pana, Panama, Papineau, Paris, Parkersburg, Park Forest, Park Ridge, Patoka, Patterson, Pawnee, Paw Paw, Paxton, Payson, Pearl, Pearl City, Pecatonica, Pekin, Penfield, Peoria, Peotone, Percy, Perks, Perry, Peru, Pesotum, Petersburg, Philo, Piasa, Pierron, Pinckneyville, Piper City, Pittsburg, Pittsfield, Plainfield, Plainville, Plano, Plato Center, Pleasant Hill, Pleasant Plains, Plymouth, Pocahontas, Polo, Pomona, Pontiac, Pontoon Beach, Poplar Grove, Port Byron, Posen, Potomac, Prairie City, Prairie Du Rocher, Prairie Grove, Prairie View, Preemption, Princeton, Princeville, Prophetstown, Prospect Heights, Pulaski, Putnam, Quincy, Radom, Raleigh, Ramsey, Rankin, Ransom, Rantoul, Rapids City, Raritan, Raymond, Red Bud, Reddick, Redmon, Renault, Reynolds, Richmond, Richton Park, Richview, Ridge Farm, Ridgway, Ridott, Rinard, Ringwood, Rio, Riverdale, River Forest, River Grove, Riverside, Riverton, Roanoke, Robbins, Roberts, Robinson, Rochelle, Rochester, Rockbridge, Rock City, Rock Falls, Rockford, Rock Island, Rockport, Rockton, Rockwood, Rolling Meadows, Rome, Romeoville, Roodhouse, Rosamond, Roscoe, Roselle, Rosemont, Roseville, Rosiclare, Rossville, Round Lake, Round Lake Beach, Roxana, Royal, Royalton, Rushville, Russell, Rutland, Sadorus, Sailor Springs, Saint Anne, Saint Augustine, Saint David, Saint Elmo, Sainte Marie, Saint Francisville, Saint Joseph, Saint Peter, Salem, Sandoval, Sandwich, San Jose, Sauget, Sauk Village, Saunemin, Savanna, Savoy, Sawyerville, Saybrook, Scales Mound, Schaumburg, Scheller, Schiller Park, Sciota, Scioto Mills, Scott Air Force Base, Scottville, Seaton, Seatonville, Secor, Seneca, Serena, Sesser, Seward, Seymour, Shabbona, Shannon, Shattuc, Shawneetown, Sheffield, Shelbyville, Sheldon, Sheridan, Sherman, Sherrard, Shiloh, Shipman, Shirland, Shirley, Shobonier, Shorewood, Shumway, Sibley, Sidell, Sidney, Sigel, Silvis, Simpson, Sims, Skokie, Smithboro, Smithfield, Smithshire, Smithton, Solon Mills, Somonauk, Sorento, South Beloit, South Elgin, South Holland, South Pekin, South Roxana, South Wilmington, Sparland, Sparta, Speer, Springerton, Springfield, Spring Grove, Spring Valley, Standard, Standard City, Stanford, Staunton, St. Charles, Steeleville, Steger, Sterling, Steward, Stewardson, Stillman Valley, St. Jacob, St. Libory, Stockland, Stockton, Stonefort, Stone Park, Stonington, Stoy, Strasburg, Strawn, Streamwood, Streator, Stronghurst, Sublette, Sugar Grove, Sullivan, Summerfield, Summit, Sumner, Sutter, Swansea, Sycamore, Table Grove, Tallula, Tamaroa, Tamms, Tampico, Taylor Ridge, Taylor Springs, Taylorville, Techny, Tennessee, Teutopolis, Texico, Thawville, Thayer, Thebes, Thomasboro, Thompsonville, Thomson, Thornton, Tilden, Tilton, Timewell, Tinley Park, Tiskilwa, Toledo, Tolono, Toluca, Tonica, Topeka, Toulon, Tovey, Towanda, Tower Hill, Tremont, Trenton, Trilla, Triumph, Trivoli, Troy, Troy Grove, Tunnel Hill, Tuscola, Ullin, Union, Union Hill, Unity, University Park, Urbana, Ursa, Utica, Valier, Valmeyer, Vandalia, Van Orin, Varna, Venice, Vergennes, Vermilion, Vermont, Vernon, Vernon Hills, Verona, Versailles, Victoria, Vienna, Villa Grove, Villa Park, Villa Ridge, Viola, Virden, Virgil, Virginia, Wadsworth, Waggoner, Walnut, Walnut Hill, Walsh, Walshville, Waltonville, Wapella, Warren, Warrensburg, Warrenville, Warsaw, Wasco, Washburn, Washington, Washington Park, Wataga, Waterloo, Waterman, Watseka, Watson, Wauconda, Waukegan, Waverly, Wayne City, Waynesville, Wedron, Weldon, Wellington, Wenona, West Brooklyn, Westchester, West Chicago, Western Springs, Westfield, West Frankfort, West Liberty, Westmont, West Point, West Salem, West Union, Westville, West York, Wheaton, Wheeler, Wheeling, White Hall, White Heath, Whittington, Williamsfield, Williamsville, Willisville, Willowbrook, Willow Hill, Willow Springs, Wilmette, Wilmington, Wilsonville, Winchester, Windsor, Winfield, Winnebago, Winnetka, Winslow, Winthrop Harbor, Witt, Wolf Lake, Wonder Lake, Wood Dale, Woodhull, Woodland, Woodlawn, Woodridge, Wood River, Woodson, Woodstock, Woosung, Worden, Worth, Wrights, Wyanet, Wyoming, Xenia, Yale, Yates City, Yorkville, Zeigler, Zion.