Illinois is a state in United States of America. Its shortcode is IL. Capital city of Illinois is Springfield. Largest city of Illinois is Chicago. This state was officially made on December 3, 1818 (Date of statehood). Total population in this state is estimated to be 12882135 approx. It covers total area of 57914 Square Miles or 149997 Square Kilometers, out of which total Land area is estimated to be of 55519 Square Miles or 143794 Square Kilometers, whereas Total Water area is estimated to be about 2395 Square Miles or 6203 http://euszipcodes.com/illinois/ Square Kilometers. There are total 105 Counties in Illinois. Total number of cities in this state is 1315 . Total number of zipcodes/pincodes in Illinois are 1645. This State has total 18 House Seats.
