Armstrong County, Pennsylvania
Founding: 1805 (declared in 1800) Parent counties: Allegheny, Lycoming, and Westmoreland Namesake: John Armstrong, Continental Army general Seat: Kittanning (1800–) Land area: 653 square miles Population (2020): 65,558 Population (historic): 2,399 (1800); 17,701 (1830); 35,797 (1860); 46,747 (1890); 79,298 (1930) Periods of population growth: pre-1800–1880; 1890–1940; 1970s Subdivisions: One city; 16 boroughs; seven CDPs; 28 townships Pre-1940 residences (estimated): 10,506 (32.1%) Pre-1940 housing survival rate: 56.9% Pre-1860 housing survival rate (1940): 8.3% Farm housing in disrepair (1950): 10.6% Nonfarm housing in disrepair (1950): 7.1% Average farmhouse value (1930): $1,559 Average outbuilding value (1930): $1,247 Average farmhouse size (1940): 6.1 rooms Number of farms (1920): 3,771 Average farm size (1920): 64.1 acres ______________________...