Carroll County, Illinois

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Carroll County is a county located in the U.S. state of Illinois. As of the 2000 census, the population was 16,674. Its county seat is Mount Carroll, Illinois[1].



Carroll County was formed in 1839 out of Jo Daviess County. The County is named for Charles Carroll who signed the Declaration of Independence. Carroll, who died in 1832 was the last signer to die.


According to the U.S. Census Bureau, the county has a total area of 466 square miles (1,207 km2). 444 square miles (1,150 km2) is land and 22 square miles (57 km2) (4.63%) is water. The Mississippi Palisades State Park is in this county, just north of the city of Savanna. The Savanna Army Depot is located partly in this county.

Adjacent counties

National protected area

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