1. World Map/
  2. North America/
  3. USA /
  4. Illinois /
  5. Illinois Geography

Illinois

Illinois Geography

From the Lake Michigan shoreline, inland for 8-10 miles, the land is g

From the Chicago suburbs, moving west toward the Iowa border, the land gradually rises into a hilly area in the far-northwest. The state's highest point, Charles Mound, at 1,235 ft., is located there.

The southern two-thirds of the state is rolling farmland, commonly called America's Corn Belt. This wide and fertile swath of land (hilly is some areas) stretches into the states of Iowa, Indiana and Missouri.

The Shawnee Hills region (a narrow strip of land) extends across the southern part of Illinois from Elizabethtown to the Missouri border. About 40 miles wide and 70 miles long, this hilly woodland rises to nearly 1,000 feet.

The state's most important river - the Mississippi - forms it's entire western border. Other rivers of note include the Illinois, Kaskaskia, Ohio and Wabash.

Major lakes, in addition to Lake Michigan, include the Carlyle, Rend, Shelbyville and Upper Peoria.

A closer look at the topography of Illinois is on this topographic map!

Illinois Photographs

Gooselake Prairie State Park, Illinois Dominic_Sherony at en.wikipedia.org

Illinois Cities, Counties & Area Codes

City County Area Code
Quincy Adams 217
Cairo Alexander 618
Greenville Bond 618
Belvidere Boone 815
Mount Sterling Brown 217
Princeton Bureau 815
Hardin Calhoun 618
Savanna Carroll 815
Beardstown Cass 217
Champaign Champaign 217
Taylorville Christian 217
Marshall Clark 217
Flora Clay 618
Carlyle Clinton 618
Charleston Coles 217
Chicago Cook 847 , 312
Robinson Crawford 618
Neoga Cumberland 217
DeKalb DeKalb 815
Clinton Dewitt 217
Tuscola Douglas 217
Naperville DuPage 630
Paris Edgar 217
Albion Edwards 618
Effingham Effingham 217
Vandalia Fayette 618
Paxton Ford 217
West Frankfort Franklin 618
Canton Fulton 309
Shawneetown Gallatin 618
Carrollton Greene 217
Morris Grundy 815
McLeansboro Hamilton 618
Carthage Hancock 217
Elizabethtown Hardin 618
Oquawka Henderson 309
Kewanee Henry 309
Watseka Iroquois 815
Carbondale Jackson 618
Newton Jasper 618
Mount Vernon Jefferson 618
Jerseyville Jersey 618
Galena Jo Daviess 815
Vienna Johnson 618
Elgin Kane 847
Aurora Kane 630
Kankakee Kankakee 815
Oswego Kendall 630
Galesburg Knox 309
Ottawa La Salle 815
Waukegan Lake 847
Lawrenceville Lawrence 618
Dixon Lee 815
Pontiac Livingston 815
Lincoln Logan 217
Decatur Macon 217
Carlinville Macoupin 217
Granite City Madison 618
Centralia Marion 618
Henry Marshall 309
Havana Mason 309
Metropolis Massac 618
Macomb McDonough 309
Crystal Lake McHenry 815
Bloomington McLean 309
Petersburg Menard 217
Aledo Mercer 309
Waterloo Monroe 618
Litchfield Montgomery 217
Jacksonville Morgan 217
Sullivan Moultrie 217
Rochelle Ogle 815
Peoria Peoria 309
Du Quoin Perry 618
Monticello Piatt 217
Pittsfield Pike 217
Golconda Pope 618
Mounds Pulaski 618
Granville Putnam 815
Chester Randolph 618
Olney Richland 618
Moline Rock Island 309
Belleville Saint Clair 618
Harrisburg Saline 618
Springfield Sangamon 217
Rushville Schuyler 217
Winchester Scott 217
Shelbyville Shelby 217
Wyoming Stark 309
Freeport Stephenson 815
Pekin Tazewell 309
Anna Union 618
Danville Vermilion 217
Mount Carmel Wabash 618
Monmouth Warren 309
Nashville Washington 618
Fairfield Wayne 618
Carmi White 618
Sterling Whiteside 815
Joliet Will 708
Marion Williamson 618
Rockford Winnebago 815
Metamora Woodford 309
This page was last modified on April 7, 2017.