Rock County, Wisconsin
Founding: 1839 (declared in 1836) Parent county: Milwaukee Namesake: The Rock River Seat: Janesville (1839–) Land area: 718 square miles Population (2020): 163,687 Population (historic): 1,701 (1840); 36,690 (1860); 38,823 (1880); 51,203 (1900); 74,206 (1930) Periods of population growth: pre-1840–1870; 1880–2020 Subdivisions: Five cities; three villages; one CDP; 20 towns Pre-1940 residences (estimated): 14,265 (20.2%) Pre-1940 housing survival rate: 70.1% Pre-1860 housing survival rate (1940): 14.4% Farm housing in disrepair (1950): 4.6% Average farmhouse value (1930): $2,243 Average outbuilding value (1930): $2,784 Average farmhouse size (1940): 7.1 rooms Number of farms (1920): 3,660 Average farm size (1920): 93.8 acres Sources of settlement: New York, Ireland, Germany, Norway, England, and New England ________________________________________________________________...