| | Description: | Carroll County, located in northern Illinois, covers an area of 444 square miles and had a 2003 population of 16,242, according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, Carroll County was the 61st largest county in Illinois geographically, but 71st largest in terms of population. Combining these two measures, Carroll County had the 71st highest population density per square mile among Illinois 102 counties. | |
