Hillsdale County, Michigan

Founding: 1835 (declared in 1829)
Parent county: Unorganized territory

Namesake: A descriptive name
Seat: Jonesville (1835–1843); Hillsdale (1843–)

Land area: 598 square miles

Population (2020): 45,746

Population (historic): 7,240 (1840); 25,675 (1860); 32,723 (1880); 29,865 (1900); 27,417 (1930)

Periods of population growth: pre-1840–1880; 1930–2010

Subdivisions: Four cities; five villages; 18 townships

Pre-1940 residences (estimated): 6,181 (28.3%)
Pre-1940 housing survival rate: 69.1%
Pre-1860 housing survival rate (1940): 21.3%

Farm housing in disrepair (1950): 12.2%

Nonfarm housing in disrepair (1950): 10.2%
Average farmhouse value (1930): $1,556
Average outbuilding value (1930): $1,541

Average farmhouse size (1940): 7.5 rooms
Number of farms (1920): 4,025
Average farm size (1920): 70.3 acres
Sources of settlement: New York, Ohio, Pennsylvania, England, Ireland, and Germany
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Hillsdale

Namesake: Hillsdale County

Founding: 1839 (platting); 1839 (post office); 1869 (incorporation)

Population (2020): 8,036

Population (historic): 1,067 (1850); 3,518 (1870); 4,151 (1900); 5,896 (1930)

Periods of population growth: 1839–1870; 1880–1970; 1980–2010
Pre-1940 residences (estimated): 1,249 (38.6%)
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