Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 82.
CLARION COUNTY, situated toward the northwest part of Pennsylvania, on the northeast side of Alleghany river, and traversed by Clarion river. Area, 530 square miles. Seat of justice, Clarion. Pop. in 185O, 23,565.