| Description: | Pike County, located on Illinois' western border, covers an area of 830 square miles and had a 2003 population of 16,927 according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, Pike County was the 88th smallest county in Illinois geographically, but 68th largest in terms of population. Combining these two measures, Pike County had the 96th highest population density per square mile among Illinois 102 counties. | |