Data & Statistics

Illinois Facts

• Capital: Springfield
• Counties: (102)
• Geographic Center: Chestnut
• Highest Point: Charles Mound - 1235 feet, 45th highest state
• Inland Water: 700 sq.mi., state with 29th largest amount of inland water
• Largest Cities: Chicago, Rockford, Peoria, Springfield, Aurora
• Largest Lakes: Carlyle Lake - 24,580 acres, Rend Lake - 18,900 acres
• Land Area: 56,400 sq. mi., 385 miles long and 218 miles wide, 24th largest state
• Latitude:36.9540° to 42.4951°N
• Longitude:87.3840° to 91.4244° W
• Lowest Point: Mississippi River - 279 feet, 33rd lowest state low point

Data Maps

• Computer-generated Illinois Thematic, Demographic, & GIS Maps (Illinois Atlas)
• Interactive Geographic Information Maps (GIS Inside Illinois)

State Archives

• Illinois Digital Archives
• Illinois State Archives

Census & Population

• Population, Housing, Economic, & Geographic Data (U.S. Census Bureau)
• State & County Quick Facts (U.S. Census Bureau)
• Population Projections

Economy

• United States Bureau of Labor Statistics
• Northern Illinois Business & Industry Data Center
• Community Profiles
• Economic Indicators
• Economic Facts & Figures

Environment & Natural Resources

• Geology & Mining Data
• Hydrology & Water Resources Data
• Plant & Wildlife Data (Natural History)
• Public Land Survey System & Base Map Data