Shelby County, Ohio

Founding: 1819
Parent county: Miami

Namesake: Isaac Shelby, Kentucky governor
Seats: Hardin (1819–1820); Sidney (1820–)

Land area: 408 square miles

Population (2020): 48,230

Population (historic): 2,106 (1820); 13,958 (1850); 24,137 (1880); 24,625 (1900); 24,924 (1930)

Periods of population growth: pre-1820–1890; 1900–1920; 1930–2010

Subdivisions: One city; eight villages; one CDP; 14 townships

Pre-1940 residences (estimated): 4,024 (19.9%)
Pre-1940 housing survival rate: 66.1%
Pre-1860 housing survival rate (1940): 14.5%

Farm housing in disrepair (1950): 3%

Nonfarm housing in disrepair (1950): 6.1%
Average farmhouse value (1930): $1,606
Average outbuilding value (1930): $1,640
Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 2,624
Average farm size (1920): 80.1 acres

Sources of settlement: Pennsylvania, Germany, Virginia, France, and New Jersey
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Sidney

Namesake: Philip Sidney, English poet

Founding: 1820 (platting); 1821 (post office); 1834 (incorporation)

Population (2020): 20,589

Population (historic): 240 (1830); 2,055 (1860); 5,688 (1900); 9,301 (1930)

Periods of population growth: 1820–2010
Pre-1940 residences (estimated): 1,583 (16.8%)

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