Genesee County, New York

Founding: 1803 (declared in 1802)
Parent county: Ontario
Namesake: The Genesee River
Seat: Batavia (1803–)
Land area: 493 square miles
Population (2020): 58,388
Population (historic): 12,588 (1810); 28,488 (1850); 31,606 (1870); 34,561 (1900); 44,468 (1930)
Periods of population growth: pre-1810–1860; 1870–2000
Subdivisions: One city; seven villages; one CDP; 13 towns
Pre-1940 residences (estimated): 10,054 (39%)
Pre-1940 housing survival rate: 82.4%
Pre-1860 housing survival rate (1940): 31.5%

Farm housing in disrepair (1950): 11.7%

Nonfarm housing in disrepair (1950): 6.5%

Average farmhouse value (1930): $2,513
Average outbuilding value (1930): $2,688
Average farmhouse size (1940): 7.8 rooms
Number of farms (1920): 2,885
Average farm size (1920): 76 acres
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Batavia

 
Namesake: The region of Batavia in the Netherlands
Founding: 1801 (platting); 1802 (post office); 1823 (incorporation)
Population (2020): 15,600
Population (historic): 1,671 (1830); 3,890 (1870); 9,180 (1900); 17,375 (1930)
Periods of population growth: pre-1830–1850; 1860–1930; 1940–1960
Pre-1940 residences (estimated): 3,305 (47.7%)
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