Columbia County, New York

Founding: 1786
Parent county: Albany
Namesake: Christopher Columbus, Italian explorer
Seat: Claverack (1786–1805); Hudson (1805–)
Land area: 635 square miles
Population (2020): 61,570
Population (historic): 27,496 (1790); 43,252 (1840); 47,044 (1870); 43,211 (1900); 41,617 (1930)
Periods of population growth: pre-1790–1800; 1810–1840; 1850s; 1870s; 1920s; 1940–1990
Subdivisions: One city; four villages; ten CDPs; 18 towns
Pre-1940 residences (estimated): 10,881 (32.4%)
Pre-1940 housing survival rate: 75.7%
Pre-1860 housing survival rate (1940): 38%

Farm housing in disrepair (1950): 6.1%

Nonfarm housing in disrepair (1950): 6.6%

Average farmhouse value (1930): $4,406
Average outbuilding value (1930): $3,379

Average farmhouse size (1940): 7.6 rooms

Number of farms (1920): 2,580
Average farm size (1920): 97.1 acres
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Hudson

 
Namesake: The Hudson River
Founding: 1785 (platting); 1785 (incorporation); 1792 (post office)
Population (2020): 5,894
Population (historic): 2,584 (1790); 5,672 (1840); 8,615 (1870); 9,528 (1900); 12,337 (1930)
Periods of population growth: pre-1790–1890; 1900–1930; 1940s
Pre-1940 residences (estimated): 1,945 (57.3%)
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