WILLIAMS COUNTY, situated at the northwest corner of Ohio. Area, 600 square miles. Seat of justice, Bryan. Pop. in 1830, 377; in 1840, 4,465; in 1850, 8,018.

WASHINGTON COUNTY, situated on the southeast boundary of Ohio, with Ohio river on the southeast, and traversed by Muskingum river. Area, 713 square miles. Face of the country, hilly; soil, near the rivers, good; elsewhere, unproductive. Seat of justice, Marietta. Pop. in 1820, 10,425; in 1830, 11,731; in 1840, 20,823; in 1850, 29,540.

WARREN COUNTY, situated in the southwest part of Ohio, and traversed by Little Miami river. Area, 400 square miles. Face of the country, hilly; soil, rich. Pop. in 1810, 9,925; in 1820, 17,837; in 1830 21,468; in 1840, 23,141; in 1850, 25,571.

VINTON COUNTY, situated in the southerly part of Ohio. Area, -------- square miles. Seat of justice, McArthur. Pop. in 1850, 9,353.

VAN WERT COUNTY, situated on the west boundary of Ohio. Area, 432 square miles. Seat of justice, Van Wert. Pop. in 1830, 49; in 1840, 1,577; in 1850, 4,816.

UNION COUNTY, situated toward the west part of Ohio. Area, 450 square miles. Face of the country, even; soil, fertile. Seat of justice, Marysville. Pop in 1820, 1,996; in 1830, 3,192; in 1840, 8,422; in 1850, 12,204.

TUSCARAWAS COUNTY, situated in the easterly part of Ohio, and traversed by Tuscarawas river. Area, 655 square miles. Seat of justice, New Philadelphia. Pop. in 1810, 3,045; in 1820, 8,328; in 1830, 14,298; in 1840, 25,631; in 1850, 31,161.

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.

SUMMIT COUNTY, situated in the northeast part of Ohio, and traversed by Cuyahoga river. Area, 422 square miles. Seat of justice, Akron. Pop. in 1840, 22,650; in 1850, 27,485.

STARK COUNTY, situated in the east part of Ohio, and traversed by Tuscarawas river. Area, 650 square miles. Seat of justice, Canton. Pop. in 1810 2,734; in 1820, 14,506; in 1830, 26,588; in 1840, 34,603; in 1850, 39,678.