| | Description: | DeKalb County, located in northern Illinois, covers an area of 634 square miles and had a 2003 population of 94,041 according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, DeKalb County was the 73rd smallest county in Illinois geographically, but 19th largest in terms of population. Combining these two measures, DeKalb County had the 19th highest population density per square mile among Illinois 102 counties. | |
