HURON COUNTY, situated in the northern part of Ohio. Area, 800 square miles. Face of the country generally even; soil fertile. Seat of justice, Norwalk. Pop in 1820, 6,676; in 1830, 13,485; in 1840 23,933; in 1850, 26,203.

HOLMES COUNTY, situated toward the northeastern part of Ohio. Area, 422 square miles. Soil, generally productive. Seat of justice, Millersburgh. Pop. in 1830 9,133; in 1840, 18,088; in 1850, 20,452.

HOCKING COUNTY, situated toward the southern part of Ohio, and traversed by Hocking river. Area, 432 square miles. Face of the country hilly and broken; soil in many parts fertile. Seat of justice, Logan. Pop. in 1820, 2,130; in 1830, 4,008; in 1840, 9,741; in 1850, 14,119.

HIGHLAND COUNTY, situated in the southern part of Ohio. Area, 555 square miles. Face of the country an elevated, moderately undulated table-land; soil fertile. Seat of justice, Hillsborough. Pop. in 1810, 5,766; in 1820, 12,308; in 1830, 16,347; in 1840, 22,269; in 1850, 25,781.

HENRY COUNTY, situated in the northwestern part of Ohio and traversed by Maumee river. Area, 576 square miles. Seat of justice, Napoleon. Pop. in 1830, 260; in 1840, 2,503; in 1850, 3,435.

HARRISON COUNTY, situated in the eastern part of Ohio. Area, 486 square miles. Face of the country broken and hilly; soil generally productive. Seat of justice, Cadiz. Pop. in 1820, 14,345; in 1830, 20,916; in 1840, 20,099; in 1850, 20,158.

HARDIN COUNTY, situated toward the northwesterly part of Ohio. Area, 480 square miles. Face of the country generally even, consisting of an elevated table land; soil, productive. Seat of justice, Kenton. Pop. in 1830, 500; in 1840 4,598; in 1850, 8,265.

HANCOCK COUNTY, situated toward the northwesterly part of Ohio. Area, 576 square miles. Face of the country even; soil productive. Seat of justice, Finley. Pop in 1830, 813; in 1840, 9,986; in 1850, 11,751.

HAMILTON COUNTY, situated at the southwest corner of Ohio, with Ohio river on the south, and traversed by Miami and Little Miami rivers, and the Miami canal. Area, 400 square miles. Face of the country, diversified with hills and vales. Soil, rich and well cultivated. Seat of justice, Cincinnati. Pop. in 1810, 15,258; in 1820, 31,764; in 1830, 52,321; in 1840, 80,145; in 1850, 156,843.

GUERNSEY COUNTY, situated toward the easterly part of Ohio. Area, 676 square miles. Face of the country generally hilly; soil of middling quality; along the valley of Wells creek, its principal stream, excellent. Seat of justice, Cambridge. Pop. in 1810, 3,051; in 1820 9,292; in 1830, 18,036; in 1840, 27,748; in 1850, 30,438.