Franklin County, Pennsylvania

Founding: 1784
Parent county: Cumberland

Namesake: Benjamin Franklin, Founding Father
Seat: Chambersburg (1784–)

Land area: 772 square miles

Population (2020): 155,932

Population (historic): 15,662 (1790); 37,793 (1840); 45,365 (1870); 54,902 (1900); 65,010 (1930)

Periods of population growth: pre-1790–2020

Subdivisions: Six boroughs; 10 CDPs; 15 townships

Pre-1940 residences (estimated): 11,044 (17%)
Pre-1940 housing survival rate: 72.8%
Pre-1860 housing survival rate (1940): 31%

Farm housing in disrepair (1950): 5.4%

Nonfarm housing in disrepair (1950): 4.3%
Average farmhouse value (1930): $1,985
Average outbuilding value (1930): $1,979
Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 3,884
Average farm size (1920): 74.3 acres
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Chambersburg

Namesake: Benjamin Chambers, owner of the city's site

Founding: 1764 (platting); 1788 (post office); 1803 (incorporation)

Population (2020): 21,903

Population (historic): 1,304 (1810); 3,335 (1850); 6,308 (1870); 8,864 (1900); 13,788 (1930)

Periods of population growth: pre-1830–1960; 1980–2020
Pre-1940 residences (estimated): 2,628 (28.8%)
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