Its total area is 57,918 square miles ( 150,010 km ) .
Illinois has a maximum north - south distance of 390 miles ( 630 km ) and 210 miles ( 340 km ) east - west .
Illinois ' total area is 57,918 square miles ( 150,010 km ) .
Illinois has a maximum north - south distance of 390 miles ( 630 km ) and 210 miles ( 340 km ) east - west .