Rock Island County, Illinois (Fanning's, 1853)
Gazetteer/Almanac
ROCK ISLAND COUNTY, situated on the northwesterly boundary of Illinois, on the Mississippi, and traversed by Rock river. Area, square miles. Seat of justice, Rock Island. Pop. in 1850, 6,397.
Fanning's Illustrated Gazetteer of the United States... (New York: Phelps, Fanning & Co., 1853), 313.