Information by State |
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US Counties
| Illinois
| Cook
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Find a Lawyer in Cook County: |
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Cook County, Illinois (IL) |
Address: |
County Building |
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118 North Clark Street |
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Chicago, Illinois 60602-1304 |
County Seat: |
Chicago |
Phone: |
312-603-5500 |
Website: |
www.co.cook.il.us |
Established: |
1831 |
Area: |
946 sq mi |
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Cook County, Illinois Communities: |
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Total Communities in Cook County, Illinois: 131 |
Population: |
5,247,662 |
5,228,455 |
5,204,502 |
5,180,493 |
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2015 * |
2016 * |
2017 * |
2018 * |
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5,194,675 |
5,219,977 |
5,240,505 |
5,254,885 |
5,257,481 |
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2010 |
2011 * |
2012 * |
2013 * |
2014 * |
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* (U.S. Census Estimate) |
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