| | Description: | Hardin County, located in southern Illinois, covers an area of 178 square miles and had a 2003 population of 4,711, according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, Hardin County was the 2nd smallest county in Illinois geographically, and 2nd smallest in terms of population. Combining these two measures, Hardin County also had the 14th lowest population density per square mile among Illinois 102 counties. | |
