Defiance County, Ohio

Founding: 1845
Parent counties: Henry, Paulding, and Williams

Namesake: The city of Defiance
Seat: Defiance (1845–)

Land area: 411 square miles

Population (2020): 38,286

Population (historic): 6,966 (1850); 15,719 (1870); 25,769 (1890); 24,498 (1910); 22,714 (1930)

Periods of population growth: 1850–1900; 1910s; 1930–1980; 1990s

Subdivisions: One city; three villages; 12 townships

Pre-1940 residences (estimated): 4,829 (28.8%)
Pre-1940 housing survival rate: 60.1%
Pre-1860 housing survival rate (1940): 9.6%

Farm housing in disrepair (1950): 5.2%

Nonfarm housing in disrepair (1950): 7%

Average farmhouse value (1930): $1,527
Average outbuilding value (1930): $1,738
Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 2,522
Average farm Size (1920): 77.6 acres
Sources of settlement: Germany, Pennsylvania, Indiana, and New York
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Defiance

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

Founding: 1822 (platting); 1825 (post office); 1836 (incorporation)

Population (2020): 17,066

Population (historic): 800 (1850); 2,750 (1870); 7,694 (1890); 7,327 (1910); 8,818 (1930)

Periods of population growth: 1850–1890; 1910s; 1930–1980; 2000–2020
Pre-1940 residences (estimated): 2,272 (29.1%)
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