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, Pennsylv...