TRUMBULL COUNTY, situated on the east boundary of Ohio, and traversed by Mahoning river. Area, 875 square miles. Face of the country, hilly; soil, fertile. Seat of justice, Warren. Pop. in 1810, 8,671; in 1820, 15,546; in 1830, 26,154; in 1840, 38,107; in 1850, 30,491. (Fanning's, 1853)