Sussex County, New Jersey

Founding: 1753
Parent county: Morris

Namesake: Sussex, England
Seat: Newton (1765–)

Land area: 519 square miles

Population (2020): 144,221

Population (historic): 19,500 (1790); 20,345 (1830); 23,846 (1860); 24,134 (1900); 27,830 (1930)

Periods of population growth: pre-1790–1820; 1830–1860; 1870s; 1890–1910; 1920–2010

Subdivisions: One town; eight boroughs; 15 townships

National Register listings: 37

Pre-1940 residences (estimated): 8,463 (13.6%)
Pre-1940 housing survival rate: 62%
Pre-1860 housing survival rate (1940): 36.5%

Farm housing in disrepair (1950): 5.8%

Nonfarm housing in disrepair (1950): 4.9%

Average farmhouse value (1930): $3,270
Average outbuilding value (1930): $2,990
Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 1,503
Average farm size (1920): 91.1 acres
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Newton

Namesake: Newtown, New York

Founding: 1762 (platting, as Newtown); 1797 (post office); 1864 (incorporation)

Population (2020): 8,374

Population (historic): 1,824 (1860); 2,513 (1880); 4,376 (1900); 5,401 (1930)

Periods of population growth: pre-1860–1910; 1920–1980; 1990s; 2010s
Pre-1940 residences (estimated): 1,416 (38.4%)
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Outstanding Buildings

1. *Sampson Dildine House. 540 Ridge Road. Fredon.
2. *Thomas Lawrence House (c. 1841). 3505 State Route 94. Hardyston. Greek Revival.
3. *Shimer House (c. 1855). 290 River Road. Montague. Greek Revival.
4. *Julius Foster House (c. 1795/1812). 320 River Road. Montague.
5. *Jacob Shimer House (c. 1795). River Road. Montague. Razed.
6. *Everitt House (c. 1740). River Road. Montague. Razed.
7. *George Nelden House. 501 US Highway 206. Montague.
8. *Philip Smith House (c. 1820). 19 Old Mine Road. Sandyston.
9. *Barrett Farm (c. 1815). 192 Barrett Road. Vernon.
10. Barnett Drew Farm (c. 1865). 99 Sand Hill Road. Vernon. Italianate/Gothic Revival.
11. *Delaware View Hotel. 1 Flatbrookville–Stillwater Road. Walpack.
12. *Daniel Shoemaker Farm (c. 1822). Mountain Road. Walpack.
13. *Isaac Van Campen House (c. 1750). Old Mine Road. Walpack. Georgian.
14. *Richard Layton Farm. Ridge Road. Walpack. Federal.
15. *Cornelius Gunn House (c. 1814). Ridge Road. Walpack. Razed.
16. Charles Cooper House. 27 Unionville Road. Wantage. Italianate.