Hardin County, Ohio

Founding: 1833 (declared in 1820)
Parent county: Unorganized territory

Namesake: John Hardin, Virginia soldier
Seat: Kenton (1833–)

Land area: 470 square miles

Population (2020): 30,696

Population (historic): 4,598 (1840); 13,570 (1860); 27,023 (1880); 31,187 (1900); 27,635 (1930)

Periods of population growth: 1830–1900; 1940–1980; 1990–2010

Subdivisions: One city; eight villages; one CDP; 15 townships

National Register listings: Seven

Pre-1940 residences (estimated): 4,261 (32.5%)
Pre-1940 housing survival rate: 55.8%
Pre-1860 housing survival rate (1940): 6.5%

Farm housing in disrepair (1950): 8.3%

Nonfarm housing in disrepair (1950): 8%

Average farmhouse value (1930): $1,485
Average outbuilding value (1930): $1,479
Average farmhouse size (1940): 6.8 rooms
Number of farms (1920): 3,052
Average farm size (1920): 80.5 acres
Sources of settlement: Pennsylvania, Germany, Virginia, Switzerland, and New York
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Kenton

Namesake: Simon Kenton, explorer

Founding: 1833 (platting); 1834 (post office); 1845 (incorporation)

Population (2020): 7,947

Population (historic): 299 (1840); 2,610 (1870); 6,852 (1900); 7,069 (1930)

Periods of population growth: 1833–1920; 1930–1960; 1970s

Pre-1940 residences (estimated): 1,189 (31.6%)

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Outstanding Buildings

1. Charles Hill House (c. 1880). 2740 State Route 81. Blanchard. Italianate.
2. *John Espy Farm (c. 1875). 13725 State Route 292. Buck. Italianate.
3. *John Clark House (c. 1876). 15577 US Highway 68. Buck. Gothic Revival.
4. *Lon Orth Farm (c. 1900). 7300 County Road 90. Cessna. Queen Anne. Razed.
5. *John King Farm (c. 1870). 22408 County Road 144. Dudley. Italianate.
6. *John Haley Farm (1836). 19959 County Road 144. Dudley. Federal.
7. *Nathan Smith Farm (c. 1870). 10875 County Road 245. Dudley. Italianate.
8. Cronley House (c. 1880). 691 East Marion Street. Hale. Italianate.
9. *George Stambaugh House (1908). 3670 State Route 81. Liberty. Renaissance Revival.
10. Farm (c. 1885). 631 State Route 309. Liberty. Italianate.
11. *Tobias Long Log House (c. 1845). 3890 County Road 15. Liberty. Razed.
12. House (c. 1870). 14335 State Route 273. Taylor Creek. Italianate.
13. Farm (c. 1880). 2257 County Road 113. Washington. Italianate.
14. St. John's Lutheran Church (c. 1900). 5015 County Road 115. Washington. Romanesque.