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Illinois 2020 Population Density Map. Illinois is the most populous state in the Midwest region. Chicago, the third-most populous city in the United States, is the center of the Chicago metropolitan area or Chicagoland, as this area is nicknamed.
Illinois has a maximum north–south distance of 390 miles (630 km) and 210 miles (340 km) east-west. Total area is 57,918 square miles (150,010 km 2 ), ranked 25th in size of the 50 states. Water area is 2,325 square miles (6,020 km 2 ); Lake Michigan accounts for most of this. Charles Mound in the northwest Driftless Area is the highest point ...
The following outline is provided as an overview of and topical guide to the U.S. state of Illinois: Illinois – fifth most populous of the 50 states of the United States of America. Illinois lies between Lake Michigan and the Mississippi River and the Ohio River in the Midwestern United States. Chicago, Illinois, is the third most populous ...
There are 102 counties in Illinois. The most populous of these is Cook County, the second-most populous county in the United States and the home of Chicago, while the least populous is Hardin County. The largest by land area is McLean County, while the smallest is Putnam County. Illinois's FIPS state code is 17 and its postal abbreviation is IL.
Map of the United States with Illinois highlighted Illinois is a state located in the Midwestern United States . According to the 2020 United States census Illinois is the 6th most populous state with 12,812,508 inhabitants but the 24th largest by land area spanning 55,499.0 square miles (143,742 km 2 ) of land. [ 1 ]
Standard Illinois route markers System information Maintained by IDOT, ISTHA, and CDOT Formed November 5, 1918 (1918-11-05) Highway names Interstates Interstate X (I-X) US Highways U.S. Route X (US X) State Illinois Route X (IL X) System links Illinois State Highway System Interstate US State Tollways Scenic The Illinois Routes are the highways in the State Highway System of the U.S. state of ...
Highway markers for Interstate 57, U.S. Route 45, Illinois Route 1 and the Chicago Skyway Overall map of system: freeways in light blue, tollways in green, other highways in yellow System information Maintained by IDOT, ISTHA, and SCC Formed November 5, 1918 (1918-11-05) Highway names Interstates Interstate X (I-X) US Highways U.S. Route X (US X) State Illinois Route X (IL X) System links ...
State protected areas [ edit] Illinois state-owned protected areas include state parks, state forests, state recreation areas, state fish and wildlife areas, state natural areas, and one state trail. These areas are all administered by the Illinois Department of Natural Resources. In addition, dozens of state historic sites are administered by ...