USGS - science for a changing world

Science In Your Backyard

Maps, Imagery, and Publications Hazards Newsroom Education Jobs Partnerships Library About USGS Social Media

Science In Your Backyard: Illinois


  • Illinois Water Science Center
    405 N Goodwin
    Urbana, IL 61801
    Phone: (217) 328-8747
    Fax: (217) 328-9770
    Office hours: 8:00 a.m. to 4:30 p.m. Central Time

  • National Spatial Data Infrastructure Partnership Office (Liason for: WI, IL)

    505 Science Drive
    Madison, WI 53711
    Phone: (608) 238-9449
    Fax: (608) 238-9334

News Releases of Interest for Illinois:

View more news releases of interest for Illinois (new window)

Illinois Real-Time Information:

Highlighted Illinois Links:

Illinois State Facts

Image of Illinois with a star pinpointing the location of the capital.
Locations on image are approximate

Capital: Springfield(Star shaped icon located on map pinpointing capital.)
Land Area: 55,584 sq. miles
(source: 2010 Census)
Population: 12,830,632
(source: 2010 Census estimate)
Highest Point:
Charles Mound at 1,235 feet, located in the county/subdivision of Jo Daviess
(source: U.S. Geological Survey)
Lowest Point:
Mississippi River at 279 feet, located in the county/subdivision of Alexander
(source: U.S. Geological Survey)
Geographic Center:
Located in Logan County approx. 28 miles northeast of Springfield
(source: U.S. Geological Survey)


Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Ask USGS
Page Last Modified: Friday, October 02, 2009