Sangamon County, Illinois
Founding: 1821 Parent counties: Bond and Madison Namesake: The Sangamon River Seat: Springfield (1821–) Land area: 868 square miles Population (2020): 196,343 Population (historic): 12,960 (1830); 19,228 (1850); 46,352 (1870); 71,593 (1900); 111,733 (1930) Periods of population growth: pre-1830–2010 Subdivisions: Four cities; 23 villages; 26 townships Pre-1940 residences (estimated): 15,027 (16.3%) Pre-1940 housing survival rate: 44.9% Pre-1860 housing survival rate (1940): 10.6% Farm housing in disrepair (1950): 5.6% Nonfarm housing in disrepair (1950): 5.4% Average farmhouse value (1930): $2,048 Average outbuilding value (1930): $1,671 Average farmhouse size (1940): 5.8 rooms Number of farms (1920): 3,425 Average farm size (1920): 134.7 acres Sources of settlement: Kentucky, Ohio, Ireland, Germany, New York, Virginia, and Pennsylvania ______...