Onondaga County, New York

Founding: 1794
Parent counties: Herkimer and Tioga
Namesake: The Onondaga people
Seat: Onondaga Hill (1794–1830); Syracuse (1830–)
Land area: 778 square miles
Population (2020): 476,516
Population (historic): 7,406 (1800); 67,911 (1840); 104,183 (1870); 168,735 (1900); 291,606 (1930)
Periods of population growth: pre-1800–1980; 1980s; 2000–2020
Subdivisions: One city; 15 villages; 12 CDPs; 19 towns
Pre-1940 residences (estimated): 48,442 (23.2%)
Pre-1940 housing survival rate: 62.1%
Pre-1860 housing survival rate (1940): 28.6%

Farm housing in disrepair (1950): 6.9%

Nonfarm housing in disrepair (1950): 5.9%

Average farmhouse value (1930): $2,496
Average outbuilding value (1930): $2,161

Average farmhouse size (1940): 7.6 rooms

Number of farms (1920): 5,652
Average farm size (1920): 59.2 acres
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Syracuse

 
Namesake: Syracuse, Sicily
Founding: 1820 (post office); 1825 (incorporation)
Population (2020): 148,620
Population (historic): 22,271 (1850); 43,051 (1870); 88,143 (1880); 108,374 (1900); 209,326 (1930)
Periods of population growth: pre-1850–1930; 1940s; 2010s
Pre-1940 residences (estimated): 29,375 (43.2%)
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