Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 328.
SENECA COUNTY, situated in the north part of Ohio, and traversed by Sandusky river. Area, 540 square miles. Soil, productive. Seat of justice, Tiffin. Pop. in 1830, 5,159; in 1840, 18,128; in 1850, 37,105.