Darke County, Ohio

Founding: 1817 (declared in 1809)
Parent county: Miami

Namesake: William Darke, Continental Army captain
Seat: Greenville (1817–)

Land area: 598 square miles

Population (2020): 51,881

Population (historic): 3,622 (1820); 26,009 (1860); 42,532 (1900); 38,009 (1930)

Periods of population growth: pre-1820–1890; 1930–1980

Subdivisions: One city; 20 villages; 20 townships

Pre-1940 residences (estimated): 8,211 (36.2%)
Pre-1940 housing survival rate: 68.6%
Pre-1860 housing survival rate (1940): 15.3%

Farm housing in disrepair (1950): 5.4%

Nonfarm housing in disrepair (1950): 6.9%

Average farmhouse value (1930): $1,663
Average outbuilding value (1930): $1,629
Average farmhouse size (1940): 6.8 rooms
Number of farms (1920): 5,456
Average farm size (1920): 60.6 acres
Sources of settlement: Pennsylvania, Indiana, Germany, Maryland, Virginia, Ireland, and France
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Greenville

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

Founding: 1808 (platting); 1815 (post office)

Population (2020): 12,786

Population (historic): 793 (1840); 2,520 (1870); 5,501 (1900); 7,036 (1930)

Periods of population growth: 1830–1890; 1900–1920; 1930–1970
Pre-1940 residences (estimated): 2,154 (32.6%)
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