Hamilton County, Ohio

Founding: 1790
Parent county: Unorganized territory

Namesake: Alexander Hamilton, Founding Father
Seat: Cincinnati (1790–)

Land area: 406 square miles

Population (2020): 830,639

Population (historic): 14,692 (1800); 156,844 (1850); 313,374 (1880); 409,479 (1900); 589,356 (1930)

Periods of population growth: pre-1800–1970; 2010s

Subdivisions: 21 cities; 17 villages; 49 CDPs; 12 townships

National Register listings: 383

Pre-1940 residences (estimated): 99,007 (26.3%)
Pre-1940 housing survival rate: 50.1%
Pre-1860 housing survival rate (1940): 19.4%

Farm housing in disrepair (1950): 6.7%

Nonfarm housing in disrepair (1950): 6.3%
Average farmhouse value (1930): $2,751
Average outbuilding value (1930): $2,061
Average farmhouse size (1940): 5.8 rooms
Number of farms (1920): 3,741
Average farm size (1920): 37.5 acres
Sources of settlement: Germany, Ireland, Pennsylvania, Virginia, and New Jersey
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Cincinnati

Namesake: The Society of the Cincinnati, an organization of Continental Army veterans

Founding: 1788 (platting as Losantiville); 1794 (post office); 1802 (incorporation)

Population (2020): 309,317

Population (historic): 850 (1800); 24,831 (1830); 161,044 (1860); 325,902 (1900); 451,160 (1930)

Periods of population growth: pre-1800–1950; 2010s
Pre-1940 residences (estimated): 94,851 (25.1%)
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Outstanding Buildings

1. *Miller Log House (1796). 6550 Clough Pike. Anderson.
2. *William Edwards House (1839). 3851 Edwards Road. Anderson. Greek Revival.
3. *William Markley House (c. 1850). 515 Five Mile Road. Anderson. Greek Revival.
4. *John Markley House (c. 1860). 6916 Five Mile Road. Anderson. Greek Revival/Italianate.
5. *George Martin House (c. 1815). 862 Four Mile Road. Anderson. Razed.
6. *Cyrus Broadwell House (c. 1840). 3882 Mount Carmel Road. Anderson. Greek Revival.
7. *Ambrose Broadwell House (1861). 4040 Mount Carmel Road. Anderson. Greek Revival/Gothic Revival.
8. *William Harrison House (c. 1825). Newtown Road. Anderson. Federal. Razed.
9. Edward Turpin Farm (c. 1860). 6676 Ragland Road. Anderson. Italianate.
10. *William Edwards House (c. 1810/1840). 3872 Round Bottom Road. Anderson. Federal.
11. *William Storms House (c. 1845). 1291 Sutton Avenue. Anderson. Greek Revival. Razed.
12. *Thomas Biggs House (c. 1860). 1 Circus Place. Columbia. Italianate.
13. *Joseph Ferris House (c. 1820/1845). 5729 Dragon Way. Columbia. Federal/Greek Revival.
14. *Eliphalet Ferris House (c. 1803). 3915 Plainville Road. Columbia.
15. *North Family Dwelling (1832–1833). 11813 Oxford Road. Crosby.
16. *Joseph Sater House (1876). 8476 Willey Road. Crosby. Italianate.
17. *William Sater House (1831/1860s). 8638 Willey Road. Crosby. Greek Revival/Italianate.
18. *Peter Diehl House (c. 1835). 2885 Diehl Road. Green.
19. *Eighteen Mile House (c. 1835). 9840 Harrison Avenue. Harrison.
20. *George Bennett House (1847). 10281 Harrison Avenue. Harrison. Greek Revival. Razed.
21. *Hamman Roudebush House (1870). 8643 Kilby Road. Harrison. Italianate.
22. *Othniel Looker House (1805). 10580 Marvin Road. Harrison.
23. *Jehu John House (1836). Stone Drive and Small Road. Harrison. Razed.
24. *Hugh Campbell House (1860). 332 Weathervane Lane. Harrison. Italianate.
25. *John Harrison House (c. 1830). Brower Road. Miami. Greek Revival. Razed.
26. *John Warder House (c. 1870). 10 Muirfield Drive. Miami. Eastlake.
27. *Chandler Log House (1795). Shawnee Lookout Road. Miami.
28. *Cary Johnson House (1821). 2145 Compton Road. Springfield. Federal.
29. *Daniel Smith House (c. 1825). 1038 North Bend Road. Springfield.
30. *James Whallon House (1816). 11000 Winton Road. Springfield. Federal.
31. *Louis Hauck House (1904). 12171 Mosteller Road. Sycamore. Classical Revival.
32. *Mortimer Matthews House (1880–1883). 600 Oak Road. Sycamore. Shingle.
33. *James Hunt House (c. 1845). 4364 Hunt Road. Sycamore. Greek Revival.
34. *Miller–Smith Log House. 11118 Kemper Avenue. Sycamore. Razed.
35. *John Elliott House (1802). 9400 Given Road. Symmes.
36. *Mathias Kugler House (1804). 7509 Glendale–Milford Road. Symmes.
37. *Christian Waldschmidt House (1804). 7567 Glendale–Milford Road. Symmes.
38. *John Reise House (c. 1890). Harrison Road. Whitewater. Queen Anne. Razed.
39. *Peter Tebow House (c. 1840/1875). 10901 Stephens Road. Whitewater. Italianate.
40. *Thomas Miller Farm (1836). 11294 US Highway 50. Whitewater. Greek Revival.
41. Abiah Hayes House (c. 1845). 11368 US Highway 50. Whitewater. Greek Revival.