The population of Will County, IL is about 687,000
The largest county in Illinois is McLean County with 1,184 square miles.
Lake County is located in the northeastern corner of Illinois. It had a population of 703,462 as of the 2010 U.S. Census.
McHenry County is a county that is located in Illinois. The county has a population of about 330,000, its county state is Woodstock, and it is the sixth largest county in Illinois.
Cook
5,287,037
Hardin County is the smallest county in Illinois with a population of 4,320 per the 2010 U.S. Census.
Northbrook, Illinois is located in Cook county. Northbrook, Illinois has a population of over thirty three thousand. The town of Northbrook was founded in 1901.
According to census.gov, the 2007 population estimate for DuPage County, Illinois is 929,192.
Cook County is the largest county in Illinois with an estimated population of 5,238,216 as of July 1, 2015 per the U.S. Census Bureau.
Schaumburg, Illinois has an estimated population of 74,227 people. Schaumburg is located in Cook County.
Cook County is the largest county in Illinois with an estimated population of 5,238,216 as of July 1, 2015 per the U.S. Census Bureau.
Pekin is a city in Tazewell County, Illinois. It had a population of 33,824 in 2014. A nearby city is Peoria.