Illinois
State of United States
Illinois is a state of the United States, and its capital is Springfield. It is the 25th largest of the country's 51 states by area, at 149,998 km². With about 12.7 million people, it ranks 6th by population and holds roughly 4% of the national total.
- Type
- State
- Capital
- Springfield
- Population
- 12,719,1416th of 51, 2025
- Area
- 149,998 km²25th of 51
- Density
- 85 per km²