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

National Register listings: 94

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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Outstanding Buildings

1. *Jacobus Vanderveer House (c. 1775). 3055 River Road. Bedminster.
2. *Van Dorn Mill (1842–1843). 287 Childs Road. Bernards.
3. *Compton House (1764/1858). 3155 Valley Road. Bernards.
4. *Jacob Ten Eyck Farm (c. 1730/1792). 234 Vanderveer Avenue. Branchburg.
5. *Philip Van Horne House (c. 1750). 941 East Main Street. Bridgewater.
6. *Tulipwood / Stephen Williams House (1892). 1165 Hamilton Street. Franklin. Shingle.
7. *Rockingham / Higgins–Berrien–Cruser House (c. 1710/1760/1802). 84 Laurel Avenue. Franklin.
8. *Benjamin Hageman Farm (1861). 209 South Middlebush Road. Franklin. Italianate.
9. *John Wyckoff House (c. 1730). 215 South Middlebush Road. Franklin.
10. *Van Liew–Suydam House (c. 1780/1875). 310 South Middlebush Road. Franklin. Italianate.
11. Abraham Cortelyou House (c. 1855). 465 Amwell Road. Hillsborough. Italianate.
12. *House (c. 1880). 1304 Orchard Drive. Hillsborough. Stick.
13. John Veghte House (c. 1875). 735 River Road. Hillsborough. Second Empire.
14. *Maplewood / John Voorhees Farm (c. 1845). Burnt Hill Road, north of Rock Brook. Montgomery. Greek Revival. Razed.
15. John Whitlock House (c. 1835). 308 Beden's Brook Road. Montgomery. Federal.
16. *Dirck Gulick House (1752). 506 Belle Mead–Blawenburg Road. Montgomery.
17. *Voorhees House (c. 1840). 172 Georgetown–Franklin Pike. Montgomery. Greek Revival.
18. *Laurence Vanderveer House (1866). 150 Millstone River Road. Montgomery. Italianate.
19. *Peter Vanderveer Farm (1860–1862). 212 Millstone River Road. Montgomery. Italianate.
20. *Garret Wyckoff House (c. 1803/1870). 618 Millstone River Road. Montgomery. Italianate.
21. *Rynear Staats Farm (c. 1845). 696 Millstone River Road. Montgomery. Italianate.
22. *John Vermeule House (c. 1787). 223 Rock Avenue. North Plainfield.
23. *Ford House (c. 1760/1830). 1 Reinman Road. Warren.