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

National Register listings: 26

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, Germany, Virginia, Maryland, and France
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Greenville

Namesake: Fort Greenville (built in 1793), 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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Outstanding Buildings

1. *Bear's Mill (1849). 6450 Arcanum–Bear's Mill Road. Adams.
2. *Abraham Studebaker Farm (1836/1855). 1750 Heritage Road. Greenville. Greek Revival/Italianate.
3. *Jesse Lucy House (c. 1870). 8050 US Highway 127. Greenville. Gothic Revival.
4. *Christopher Walker House (1884). 1042 State Route 121. Harrison. Italianate.
5. *William Thomas Farm (1865). 1614 Thomas Road. Harrison. Italianate.
6. George Lambert House (c. 1880). 282 State Route 571. Jackson. Italianate.
7. *James Clemens Farm (c. 1850). 467 Stingley Road. Liberty. Greek Revival.
8. *John Niswonger Farm (c. 1835). 8577 Oakes Road. Monroe.
9. *Jacob Funderberg Farm (c. 1855). 9755 Oakes Road. Monroe. Greek Revival.
10. Noah Fryman Log House (c. 1857). 1724 Karr Road. Monroe. Dismantled.
11. Jacob Baker House (c. 1880). 2565 US Highway 36. Neave. Italianate.
12. *John Simon Log House (c. 1855). 11358 Darke–Shelby County Line Road. Wayne. Razed.