Jefferson County, Ohio

Founding: 1797
Parent county: Washington

Namesake: Thomas Jefferson, U.S. president
Seat: Steubenville (1797–)

Land area: 408 square miles

Population (2020): 65,249

Population (historic): 8,766 (1800); 25,030 (1840); 29,188 (1870); 44,357 (1900); 88,307 (1930)

Periods of population growth: pre-1800–1850; 1860–1940; 1950s

Subdivisions: Two cities; 17 villages; four CDPs; 14 townships

Pre-1940 residences (estimated): 8,366 (25.6%)
Pre-1940 housing survival rate: 36.3%
Pre-1860 housing survival rate (1940): 25%

Farm housing in disrepair (1950): 19.7%

Nonfarm housing in disrepair (1950): 9.9%

Average farmhouse value (1930): $1,461
Average outbuilding value (1930): $921
Average farmhouse value (1940): 5.8 rooms
Number of farms (1920): 1,866
Average farm size (1920): 76.1 acres
Sources of settlement: Pennsylvania, Virginia, Ireland, England, and Maryland
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Steubenville

Namesake: Fort Steuben, which once occupied the city's site

Founding: 1797 (platting); 1802 (post office); 1805 (incorporation)

Population (2020): 18,161

Population (historic): 731 (1800); 4,247 (1840); 12,093 (1880); 14,349 (1900); 35,422 (1930)

Periods of population growth: 1797–1940

Pre-1940 residences (estimated): 2,417 (26.5%)
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Outstanding Buildings

1. Benjamin Coe House (c. 1875). 803 State Route 43. Island Creek. Italianate.
2. William Van Tilburg House (c. 1868). 613 County Road 68. Knox. Italianate.
3. David Shelly House (c. 1835). 403 Township Road 241. Knox.
4. Clark Terrell Farm (c. 1830). 1521 County Road 1. Mount Pleasant. Federal.
5. George Clark House (c. 1832/1880). 2004 State Route 150. Mount Pleasant. Italianate.
6. Penrose Hussey Farm (c. 1848/1890). 3232 State Route 150. Mount Pleasant. Italianate.
7. Isaac Shane House (c. 1835). 3568 County Road 54. Ross.
8. John Copeland House (c. 1875). 5840 State Route 646. Salem. Italianate.
9. John Culp House (1868). 1706 County Road 68. Saline. Italianate.
10. Thomas Hamilton Farm (c. 1850). 7128 County Road 10. Smithfield. Greek Revival/Italianate.
11. Robert Henderson Farm (1872). 103 County Road 12. Smithfield. Italianate/Gothic Revival.
12. Benjamin Cope Farm (1882). 302 State Route 151. Smithfield. Italianate.
13. Nathan Hussey Farm (c. 1850). 4122 Township Road 120. Smithfield. Greek Revival.
14. Nathan Hayne House (c. 1830). 407 Township Road 130. Smithfield.
15. Daniel Tarr House (c. 1830). 601 Township Road 167. Wells.

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