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Illinois State Facts & Heritage
• Official Symbols• Topography & Climate• State Portals
Illinois Fact Sheet Executive Summary
Print or save a formatted 1-page reference guide containing all key symbols, facts, and government resources.
Official Heritage & Symbols21st State
"State Sovereignty, National Union"
Translation: "State Sovereignty, National Union"
Commemorative Quarter
2003
Statehood Rank
December 3, 1818
State Bird
Northern Cardinal
State Flower
Violet
State Tree
White Oak
State Anthem / Song
Illinois
State Beverage
Milk
State Gemstone / Mineral
Fluorite
State Insect / Butterfly
Monarch Butterfly
State Fish
Bluegill
Topography & Terrain Live Data
Illinois Topography & Geographic Elevations
Total Territory Area
57,914 sq mi sq mi
Highest Natural Point
Charles Mound: 1,235 ft (376 m)
Verified State Topographic Peak
Lowest Natural Point
Mississippi River: 279 ft (85 m)
Verified Base Elevation Datum
Land Area Share: 97.6%Water Coverage: 2.4%
Köppen Climate Classification:
Humid ContinentalSubtropical
Live State Portals & Filings
Illinois Official Government & Business Portals
Telecom, Postal & Federal Identifiers
Regional Area Codes
217, 309, 312, 618, 630, 708, 773, 815, 847
Postal Zip Code Range
60001 – 62999
Federal Census Region
Midwest
Timezone(s)
Central Time (CST/CDT)