| | Description: | Hancock County, located in western Illinois, covers an area of 795 square miles and had a 2003 population of 19,393, according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, Hancock County was the 16th largest county in Illinois geographically, but 41st smallest in terms of population. Combining these two measures, Hancock County had the 12th lowest population density per square mile among Illinois 102 counties. | |
