Williamson County, Illinois (Fanning's, 1853)
Gazetteer/Almanac
WILLIAMSON COUNTY, situated in the south part of Illinois. Area, 432 square miles. Seat of justice, Marion. Pop. in 1840, 4,457; in 1850, 7,216.
Fanning's Illustrated Gazetteer of the United States... (New York: Phelps, Fanning & Co., 1853), 391.