Somerset County, New Jersey

Founding: 1688
Parent county: Middlesex

Namesake: Somerset, England
Seat: Millstone (1688–1784); Somerville (1784–)

Land area: 302 square miles

Population (2020): 345,361

Population (historic): 12,296 (1790); 17,455 (1840); 23,510 (1870); 32,948 (1900); 65,132 (1930)

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

Subdivisions: 12 boroughs; nine townships

Pre-1940 residences (estimated): 12,606 (10%)
Pre-1940 housing survival rate: 71.3%
Pre-1860 housing survival rate (1940): 40.9%

Farm housing in disrepair (1950): 3.4%

Nonfarm housing in disrepair (1950): 2.5%

Average farmhouse value (1930): $4,857
Average outbuilding value (1930): $4,038
Average farmhouse size (1940): 7.2 rooms
Number of farms (1920): 1,454
Average farm size (1920): 77.7 acres
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Somerville

Namesake: The Somerville family, which owned the city site

Founding: circa 1755 (founding); 1827 (post office); 1863 (incorporation)

Population (2020): 12,346

Population (historic): 2,236 (1870); 3,861 (1890); 5,060 (1910); 8,255 (1930)

Periods of population growth: pre-1870–1970; 1990s; 2010s
Pre-1940 residences (estimated): 1,370 (26.1%)
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