| Description: | Fulton County, located in western Illinois, covers an area of 856 square miles and had a 2003 population of 37,658, according to estimates by the U.S. Department of Commerce's Bureau of the Census. Using these figures, Fulton County was the 10th largest county in Illinois geographically, but 38th largest in terms of population. Combining these two measures, Fulton County had the 57th highest population density per square mile among Illinois 102 counties. | |