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

National Register listings: 14

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
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Kittanning

Namesake: A Lenape village which formerly occupied the site

Founding: circa 1800 (founding); 1803 (incorporation); 1807 (post office)

Population (2020): 3,921

Population (historic): 318 (1820); 1,561 (1850); 1,889 (1870); 3,902 (1900); 7,808 (1930)

Periods of population growth: pre-1810–1930; 1940s
Pre-1940 residences (estimated): 1,236 (51.7%)
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Outstanding Buildings

1. *David Duff House (1878). 162 Indiana Road. Cowanshannock. Italianate.
2. *John Cowan House (c. 1838). 106 Pence Road. East Franklin. Greek Revival.
3. *Robinson Chapel (1902–1903). 200 Robinson Road. Hovey. Gothic Revival.
4. *Samuel Robinson Farm (1872–1874). 221 Robinson Road. Hovey. Italianate.
5. Joseph Shoemaker House (c. 1845/1870). 1250 State Route 56. Kiskiminetas. Italianate.
6. Heilman Lutheran Church (1879). 854 Garrett's Run Road. Kittanning. Eastlake.
7. *Hiram Sedwick House (c. 1900). 171 Castle Drive. Perry. Queen Anne.
8. Ralston House (c. 1865). 10829 US Highway 422. Plum Creek. Italianate.
9. Robert Townsend House (c. 1850). 341 Beagle Club Road. South Bend. Greek Revival.
10. Allshouse House (c. 1835). 237 Idaho Road. South Bend. Federal.
11. Farm (c. 1890). 200 Maple Road. South Bend. Queen Anne.
12. *Matthew Brown House (c. 1840). East Brady Road, west of Porterfield Hill Road. Sugar Creek. Greek Revival. Razed.
13. *St. Patrick Catholic Church (1939). Rattigan Road, east of St. Patrick Road. Sugar Creek. Romanesque.
14. *St. Patrick Log Catholic Church (c. 1805). 422 State Route 4007. Sugar Creek.
15. *William Marshall House (c. 1830). 123 Rock Road. Wayne. Classical Revival.