Adams County, Ohio

Founding: 1797
Parent counties: Hamilton and Washington

Namesake: John Adams, U.S. president
Seats: Manchester (1797); Adamsville (1798); Washington (1799–1804); West Union (1804–)

Land area: 584 square miles

Population (2020): 27,477

Population (historic): 3,432 (1800); 13,183 (1840); 20,750 (1870); 26,328 (1900); 20,381 (1930)

Periods of population growth: pre-1800–1900; 1930s; 1970–2010

Subdivisions: Six villages; two CDPs; 15 townships

Pre-1940 residences (estimated): 2,040 (15.8%)
Pre-1940 housing survival rate: 39.5%
Pre-1860 housing survival rate (1940): 18.2%

Farm housing in disrepair (1950): 21.9%

Nonfarm housing in disrepair (1950): 17.2%

Average farmhouse value (1930): $752
Average outbuilding value (1930): $590
Average farmhouse size (1940): 5.7 rooms
Number of farms (1920): 3,650
Average farm size (1920): 58.7 acres
Sources of settlement: Pennsylvania, Virginia, and Kentucky
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West Union

Namesake: Unknown

Founding: 1804 (platting); 1805 (post office); 1859 (incorporation)

Population (2020): 3,004

Population (historic): 229 (1810); 444 (1850); 1,033 (1900); 1,094 (1930)

Periods of population growth: 1804–1840; 1850–1910; 1920–1990; 2000s

Pre-1940 residences (estimated): 122 (7.9%)

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