Juniata County, Pennsylvania

Founding: 1831
Parent county: Mifflin

Namesake: The Juniata River
Seat: Mifflintown (1831–)

Land area: 391 square miles

Population (2020): 23,509

Population (historic): 11,080 (1840); 17,390 (1870); 16,054 (1900); 14,325 (1930)

Periods of population growth: pre-1840–1880; 1930s; 1950–2010

Subdivisions: Four boroughs; five CDPs; 13 townships

Pre-1940 residences (estimated): 2,490 (22.4%)
Pre-1940 housing survival rate: 69.7%
Pre-1860 housing survival rate (1940): 28%

Farm housing in disrepair (1950): 11.3%

Nonfarm housing in disrepair (1950): 8.9%
Average farmhouse value (1930): $1,371
Average outbuilding value (1930): $1,304
Average farmhouse size (1940): 6.8 rooms
Number of farms (1920): 1,572
Average farm size (1920): 63.4 acres
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Mifflintown

Namesake: Thomas Mifflin, Pennsylvania politician

Founding: 1790 (platting); 1831 (post office); 1833 (incorporation)

Population (2020): 840

Population (historic): 485 (1850); 857 (1870); 953 (1900); 1,027 (1930)

Periods of population growth: pre-1850–1860; 1910s; 1980s
Pre-1940 residences (estimated): 291 (59.6%)
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