Information by State |
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US Counties
| Illinois
| St. Clair
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Find a Lawyer in St. Clair County: |
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St. Clair County, Illinois (IL) |
Address: |
County Courthouse |
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P.O. Box 230 |
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Belleville, Illinois 62565-0230 |
County Seat: |
Belleville |
Phone: |
217-774-4421 |
Website: |
www.co.st-clair.il.us |
Established: |
1790 |
Area: |
664 sq mi |
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St. Clair County, Illinois Communities: |
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Total Communities in St. Clair County, Illinois: 37 |
Population: |
264,805 |
263,102 |
262,426 |
261,059 |
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2015 * |
2016 * |
2017 * |
2018 * |
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270,056 |
270,006 |
268,646 |
266,805 |
265,922 |
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2010 |
2011 * |
2012 * |
2013 * |
2014 * |
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* (U.S. Census Estimate) |
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