Beaver County, Pennsylvania

Founding: 1803 (declared in 1800)
Parent counties: Allegheny and Washington

Namesake: The Beaver River
Seat: Beaver (1800–)

Land area: 435 square miles

Population (2020): 168,215

Population (historic): 5,776 (1800); 24,183 (1830); 29,140 (1860); 56,432 (1900); 149,062 (1930)

Periods of population growth: pre-1800–1840; 1850–1970

Subdivisions: Two cities; 29 boroughs; two CDPs; 26 townships

National Register listings: 22

Pre-1940 residences (estimated): 19,922 (25.2%)
Pre-1940 housing survival rate: 56.1%
Pre-1860 housing survival rate (1940): 29.5%

Farm housing in disrepair (1950): 8.3%

Nonfarm housing in disrepair (1950): 5.9%

Average farmhouse value (1930): $1,991
Average outbuilding value (1930): $1,332
Average farmhouse size (1940): 5.6 rooms
Number of farms (1920): 2,514
Average farm size (1920): 63 acres
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Beaver

Namesake: The Beaver River

Founding: 1792 (platting as Beavertown); 1801 (post office); 1802 (incorporation)

Population (2020): 4,838

Population (historic): 361 (1820); 2,054 (1850); 1,178 (1880); 2,348 (1900); 5,665 (1930)

Periods of population growth: pre-1820–1830; 1840s; 1860–1930; 1940s; 2010s
Pre-1940 residences (estimated): 1,286 (55.6%)
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Outstanding Buildings

1. *Charles Wray House (1835). 1010 Beaner Hollow Road. Brighton. Federal.
2. Alexander Morrow House (c. 1875). 965 Tuscarawas Road. Brighton. Italianate.
3. John Wilson House (c. 1820). 256 Park Road. Chippewa. Federal.
4. House (c. 1875). 2303 Mercer Road. Daugherty. Italianate.
5. *David Littell Farm (1851). 2039 Frankfort Road. Hanover. Greek Revival.