Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 141.
GREENE COUNTY, situated toward the westerly part of Illinois, with Illinois river on the west. Area, 942 square miles. Face of the country rolling; soil, fertile. Seat of justice, Carrollton. Pop. in 1830, 7,674; in 1840, 11,951; in 1850, 3,658.