Hamilton County, New York

Founding: 1847 (declared in 1816)
Parent county: Montgomery

Namesake: Alexander Hamilton, Founding Father
Seat: Lake Pleasant (1847–)

Land area: 1,717 square miles

Population (2020): 5,107

Population (historic): 1,251 (1820); 2,188 (1850); 2,960 (1870); 4,947 (1900); 3,929 (1930)

Periods of population growth: pre-1820–1860; 1870–1900; 1930s; 1950–2000; 2010s

Subdivisions: One village; two CDPs; nine towns

National Register listings: 22

Pre-1940 residences (estimated): 2,162 (24.3%)
Pre-1940 housing survival rate: 76.9%
Pre-1860 housing survival rate (1940): 7.7%

Farm housing in disrepair (1950): 17.4%

Nonfarm housing in disrepair (1950): 9%

Average farmhouse value (1930): $2,721
Average outbuilding value (1930): $3,315

Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 255
Average farm size (1920): 48.7 acres
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Lake Pleasant

Namesake: Lake Pleasant

Founding: 1828 (post office)

Population (2020): 897

Population (historic): 312 (1820); 305 (1850); 318 (1870); 469 (1900); 540 (1930)

Periods of population growth: pre-1820; 1830s; 1850s; 1880–1900; 1920s; 1940s; 1960s
Pre-1940 residences (estimated): 312 (20.7%)
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