Bergen County, New Jersey

Founding: 1683
Parent county: Unorganized territory

Namesake: Uncertain—perhaps Bergen, North Holland
Seat: Bergen (1683–1710); Hackensack (1710–)

Land area: 233 square miles

Population (2020): 955,732

Population (historic): 12,601 (1790); 13,233 (1840); 30,122 (1870); 78,441 (1900); 364,977 (1930)

Periods of population growth: pre-1790–1830; 1840–1970; 1990–2020

Pre-1940 residences (estimated): 73,035 (20.4%)
Pre-1940 housing survival rate: 66.7%
Pre-1860 housing survival rate (1940): 33.4%

Farm housing in disrepair (1950): 2.7%

Nonfarm housing in disrepair (1950): 1.4%

Average farmhouse value (1930): $5,491
Average outbuilding value (1930): $3,693
Average farmhouse size (1940): 6.5 rooms
Number of farms (1920): 1,012
Average farm size (1920): 21.5 acres
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Hackensack

Namesake: The Hackensack River

Founding: 1690s (founding); 1797 (post office); 1921 (incorporation)

Population (2020): 46,030

Population (historic): 2,835 (1810); 2,104 (1840); 4,929 (1870); 9,443 (1900); 24,568 (1930)

Periods of population growth: pre-1810; 1830–1870; 1880–2020
Pre-1940 residences (estimated): 3,979 (19.5%)
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