Warren County, New Jersey

Founding: 1824
Parent county: Sussex

Namesake: Joseph Warren, Boston revolutionary leader
Seat: Belvidere (1824–)

Land area: 357 square miles

Population (2020): 109,632

Population (historic): 18,627 (1830); 28,433 (1860); 36,589 (1880); 37,781 (1900); 49,319 (1930)

Periods of population growth: pre-1830–1880; 1890–2020

Subdivisions: Three towns; two boroughs; 17 townships

Pre-1940 residences (estimated): 10,943 (24.1%)
Pre-1940 housing survival rate: 79.2%
Pre-1860 housing survival rate (1940): 39.4%

Farm housing in disrepair (1950): 5.4%

Nonfarm housing in disrepair (1950): 4.9%

Average farmhouse value (1930): $2,089
Average outbuilding value (1930): $1,895
Average farmhouse size (1940): 7 rooms
Number of farms (1920): 1,666
Average farm size (1920): 76.7 acres
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Belvidere

Namesake: The Italian word belvidere ("to see beauty")

Founding: 1800 (post office); 1845 (incorporation)

Population (2020): 2,520

Population (historic): 1,001 (1850); 1,882 (1870); 1,784 (1900); 2,073 (1930)

Periods of population growth: pre-1850–1870; 1910–1930; 1940–1970; 1980–2000
Pre-1940 residences (estimated): 628 (52.9%)
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