Cook County, Illinois
Founding: 1831 Parent county: Putnam Namesake: Daniel Cook, Illinois politician Seat: Chicago (1831–) Land area: 945 square miles Population (2020): 5,275,541 Population (historic): 10,201 (1840); 144,954 (1860); 607,524 (1880); 1,838,735 (1900); 3,982,123 (1930) Periods of population growth: pre-1840–1970; 1990s; 2010s Subdivisions: 23 cities; one town; 111 villages; 29 townships Pre-1940 residences (estimated): 645,442 (29.3%) Pre-1940 housing survival rate: 48% Pre-1860 housing survival rate (1940): 13.4% Farm housing in disrepair (1950): 4.7% Nonfarm housing in disrepair (1950): 5.2% Average farmhouse value (1930): $3,090 Average outbuilding value (1930): $2,939 Average farmhouse size (1940): 6.4 rooms Number of farms (1920): 5,305 Average farm size (1920): 57.2 acres Sources of settlement: Germany, Ireland, New York, and England _________...