| | Description: | Douglas County, located in east central Illinois, covers an area of 417 square miles and had a 1998 population of 19,923, according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, Douglas County was the 70th largest county in Illinois geographically, but 58th largest in terms of population. Combining these two measures, Douglas County had the 52nd highest population density per square mile among Illinois 102 counties. | |
