Blair County, Pennsylvania
Founding: 1846 Parent counties: Bedford and Huntingdon Namesake: John Blair, prominent local resident Seat: Hollidaysburg (1846–) Land area: 526 square miles Population (2020): 122,822 Population (historic): 21,777 (1850); 38,051 (1870); 70,866 (1890); 108,858 (1910); 139,840 (1930) Periods of population growth: pre-1850–1940; 1970s Subdivisions: One city; eight boroughs; eight CDPs; 15 townships Pre-1940 residences (estimated): 18,632 (32.9%) Pre-1940 housing survival rate: 59.1% Pre-1860 housing survival rate (1940): 28.7% Farm housing in disrepair (1950): 10.6% Nonfarm housing in disrepair (1950): 7.5% Average farmhouse value (1930): $1,755 Average outbuilding value (1930): $1,671 Average farmhouse size (1940): 6.5 rooms Number of farms (1920): 1,626 Average farm size (1920): 64.8 acres ____________________________________________________________...