Berks County, Pennsylvania


Founding: 1752
Parent counties: Lancaster and Philadelphia
Namesake: Berkshire, England 
Seat: Reading (1752–)
Land area: 857 square miles
Population (2020): 428,849
Population (historic): 30,189 (1790); 64,569 (1840); 106,701 (1870); 159,615 (1900); 231,717 (1930)
Periods of population growth: pre-1790–2020
Subdivisions: One city; 27 boroughs; 54 CDPs; 44 townships
Pre-1940 residences (estimated): 44,754 (26.8%)
Pre-1940 housing survival rate: 73.7%
Pre-1860 housing survival rate (1940): 37.3%
Farm housing in disrepair (1950): 5.1%
Nonfarm housing in disrepair (1950): 2.8%
Average farmhouse value (1930): $1,986
Average outbuilding value (1930): $1,938
Average farmhouse size (1940): 6.6 rooms
Number of farms (1920): 6,089
Average farm size (1920): 58.3 acres
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Reading
 
Namesake: Reading, England
Founding: 1748 (platting); 1778 (post office); 1783 (incorporation)
Population (2020): 95,112
Population (historic): 2,225 (1790); 8,410 (1840); 33,930 (1870); 78,961 (1900); 111,171 (1930)
Periods of population growth: pre-1790–1930; 1990–2020
Pre-1940 residences (estimated): 17,608 (52.4%)
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