50States.com - Illinois Illinois Illinois Products, Land Area, Highest Point Illinois Illinois Illinois Illinois Illinois IL Illinois Illinois Information Illinois Illinois Illinois Illinois Illinois Illinois ILLINOIS 57918 square miles 57918 square miles Illinois Illinois 50states.com 50 States- Illinois Illinois Illinois Info General Information about Illinois Illinois 50,000+ sq. mi Illinois Illinois Illinois Illinois 50 States.com -- Illinois Illinois State Symbols Capital Constitution Flags 50 STATES.COM Illinois Illinois.gov