Clinton County, Ohio

Founding: 1810
Parent counties: Highland and Warren

Namesake: George Clinton, New York governor
Seat: Wilmington (1810–)

Land area: 409 square miles

Population (2020): 42,018

Population (historic): 2,674 (1810); 15,719 (1840); 21,914 (1870); 24,202 (1900); 21,547 (1930)

Periods of population growth: pre-1810–1880; 1930–2010

Subdivisions: One city; eight villages; 13 townships

National Register listings: 19

Pre-1940 residences (estimated): 3,126 (17.3%)
Pre-1940 housing survival rate: 61.4%
Pre-1860 housing survival rate (1940): 19.1%

Farm housing in disrepair (1950): 5.4%

Nonfarm housing in disrepair (1950): 8%
Average farmhouse value (1930): $1,608
Average outbuilding value (1930): $1,235
Average farmhouse size (1940): 6.5 rooms
Number of farms (1920): 2,411
Average farm size (1920): 96.1 acres
Sources of settlement: Virginia, Pennsylvania, and North Carolina
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Wilmington

Namesake: Wilmington, Delaware

Founding: 1810 (platting as Clinton); 1813 (post office); 1828 (incorporation)

Population (2020): 12,664

Population (historic): 235 (1820); 1,238 (1850); 2,745 (1880); 3,613 (1900); 5,332 (1930)

Periods of population growth: 1810–1850; 1860–2020
Pre-1940 residences (estimated): 985 (16.6%)
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Outstanding Buildings

1. *Eli Harvey Farm (c. 1826). 1133 Lebanon Road. Adams.
2. *Zephaniah Underwood Farm (1884–1886). 9230 State Route 73. Chester. Eastlake.
3. *Eli McMillan Farm (1840). 284 Wall Road. Chester.
4. John Leaf House (c. 1855). 10803 State Route 134. Clark. Greek Revival.
5. *Michael Turner Farm (1870). 10293 State Route 134. Clark. Greek Revival.
6. *William Turner Farm (c. 1870). 190 Townsend Road. Clark. Italianate.
7. Jesse Cline House (c. 1835). 7471 State Route 350. Green. Federal.
8. *Snow Hill Inn / Charles Harris Tavern (1828). 11093 State Route 73. Green.
9. *Zephaniah Spear Farm (1853–1854). 11569 State Route 73. Green. Greek Revival.
10. *Squire Harris Farm (c. 1830). 10356 State Route 73. Green. Federal.
11. Hiatt Farm (c. 1875). 6189 US Highway 68. Liberty. Italianate.
12. *William Lomax Farm (c. 1842). 684 Bobbitt Road. Union.
13. *John Leonard House (c. 1835). 244 Center Road. Union.
14. *Jacob Haines Farm (1804/1845). 733 Curry Road. Union. Greek Revival.
15. William Rudduck House (c. 1845). 783 Mitchell Road. Union. Greek Revival.
16. *Thomas Rannells House (c. 1850). 2978 Prairie Road. Union. Greek Revival.
17. Levi Custis Farm (1881). 4848 US Highway 22. Union. Italianate.
18. *James Harris Farm (c. 1819). 2104 Creek Road. Vernon.
19. *Thomas Hardin Log House (c. 1800). 6190 State Route 350. Vernon. Razed.
20. *Pansy School (1900). 10554 State Route 730. Vernon. Romanesque.
21. *Pansy Methodist Church (1885). 10554 State Route 730. Vernon. Gothic Revival.