Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 73.
CHAMPAIGN COUNTY, situated toward the westerly part of Ohio, and traversed by Mad river. Area, 450 square miles. Face of the country level, or gently undulating, with a soil exuberantly fertile. Seat of justice, Urbana. Pop. in 1820, 8,479; in 1830, 12,130; in 1840, 16,721; in 1850, 19,762.