Delaware County, New York

Founding: 1797
Parent counties: Otsego and Ulster

Namesake: The Delaware River
Seat: Delhi (1799–)

Land area: 1,442 square miles

Population (2020): 44,308

Population (historic): 10,228 (1800); 35,396 (1840); 42,972 (1870); 46,413 (1900); 41,163 (1930)

Periods of population growth: pre-1800–1870; 1880–1900; 1940s; 1960–2000

Subdivisions: Ten villages; four CDPs; 19 towns

National Register listings: 74

Pre-1940 residences (estimated): 9,411 (29.8%)
Pre-1940 housing survival rate: 72.9%
Pre-1860 housing survival rate (1940): 33.2%

Farm housing in disrepair (1950): 11.9%

Nonfarm housing in disrepair (1950): 7.1%

Average farmhouse value (1930): $1,998
Average outbuilding value (1930): $2,256
Average farmhouse size (1940): 8.2 rooms
Number of farms (1920): 4,613
Average farm size (1920): 91.5 acres
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Delhi

Namesake: Delhi, India

Founding: circa 1797 (founding); 1801 (post office); 1821 (incorporation)

Population (2020): 2,721

Population (historic): 1,201 (1860); 1,384 (1880); 2,078 (1900); 1,840 (1930)

Periods of population growth: pre-1860–1900; 1920s; 1940–1980; 2000s
Pre-1940 residences (estimated): 505 (56.1%)
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Outstanding Buildings

1. William Thomson Farm (c. 1840). 545 Cape Horn Road. Bovina. Greek Revival.
2. Newell Farm (c. 1835). 12527 State Route 23. Davenport. Federal.
3. *Murray Hill / William Murray House (1867). 1 Murray Hill Road. Delhi. Italianate.
4. *Samuel Sherwood Estate (c. 1804/1842/1910s). 484 Sherwood Road. Delhi. Federal.
5. *Gideon Frisbee Farm (c. 1798). 46549 State Route 10. Delhi. Federal.
6. *East Delhi Christian Church (1861). 47202 State Route 10. Delhi. Gothic Revival.
7. House (c. 1885). 7343 State Route 8. Deposit. Eastlake/Italianate.
8. Samuel Miller House (c. 1870). 13565 State Route 357. Franklin. Italianate.
9. John Hawley Farm (1855). 34055 State Route 10. Hamden.
10. Ingalls Farm (c. 1870). 12177 Pomeroy Corners Road. Masonville. Italianate.
11. Dish House (c. 1870). 15805 State Route 8. Masonville. Italianate.
12. James McDonald Farm (1851). 3849 Elk Creek Road. Meredith. Greek Revival.
13. House (c. 1820). 474 MacDougall Road. Federal.
14. House (c. 1840). 9575 State Route 28. Meredith. Greek Revival.
15. House (c. 1885). 3 Kapitko Road. Middletown. Eastlake.
16. *Nelson Van Bunschoten Farm (c. 1890). 1478 Margaretville Mountain Road. Middletown. Queen Anne.
17. *Isaac Hardenburgh House (c. 1790/1820). 40333 State Route 23. Roxbury.
18. House (c. 1845). 606 Gifford Road. Sidney. Greek Revival.