Rockland County, New York

Founding: 1798
Parent county: Orange
Namesake: A descriptive name
Seat: New City (1798–)
Land area: 174 square miles
Population (2020): 338,329
Population (historic): 6,353 (1800); 11,975 (1840); 25,213 (1870); 38,298 (1900); 59,599 (1930)
Periods of population growth: pre-1800–1910; 1920–2020
Subdivisions: 19 villages; 17 CDPs; five towns
National Register listings: 93
Pre-1940 residences (estimated): 14,163 (13.3%)
Pre-1940 housing survival rate: 69.3%
Pre-1860 housing survival rate (1940): 31.5%

Farm housing in disrepair (1950): 4.1%

Nonfarm housing in disrepair (1950): 4.1%

Average farmhouse value (1930): $5,662
Average outbuilding value (1930): $6,129

Average farmhouse size (1940): 6.5 rooms
Number of farms (1920): 831
Average farm size (1920): 25.6 acres
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New City

 
Namesake: A descriptive name
Founding: 1798 (founding); 1876 (post office)
Population (2020): 34,135
Pre-1940 residences (estimated): 796 (6.7%)
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Outstanding Buildings

1. *Valley Cottage / DeBaun–Green House (1824/1850s). 458 Kings Highway. Clarkstown. Gothic Revival.
2. *Jacob Blauvelt House (1832). 20 Zukor Road. Clarkstown.
3. *Fraser House (c. 1812). 17 US Highway 9W. Haverstraw. Federal.
4. *Michael Salyer House (c. 1790). 213 Blue Hill Road. Orangetown.
5. *Daniel DeClark House (1700). 20 Livingston Street. Orangetown.
6. *Stonehurst / Isaac Dederer House (1865). 63 Rockland Road. Orangetown. Gothic Revival.
7. *House (c. 1735/1867). 201 US Highway 9W. Orangetown. Gothic Revival.
8. *James Hopson House (c. 1850/1869/1920). 435 US Highway 9W. Orangetown. Second Empire.
9. *West Hempstead Reformed Church (1856). 220 Brick Church Road. Ramapo. Greek Revival.
10. *Torne Brook Farm / Charles Pierson Estate (c. 1872/1920). 1 Torne Brook Road. Ramapo. Italianate/Eastlake.
11. *Watson Tomkins House (1872). 73 North Liberty Drive. Stony Point. Italianate/Gothic Revival.
12. *Bear Mountain Inn (1915). 99 Service Road. Stony Point. Adirondack.