Ross County, Ohio

Founding: 1798
Parent counties: Adams, Hamilton, and Washington

Namesake: James Ross, Pennsylvania senator
Seat: Chillicothe (1798–)

Land area: 689 square miles

Population (2020): 77,093

Population (historic): 8,540 (1800); 32,074 (1850); 40,307 (1880); 40,940 (1900); 45,181 (1930)

Periods of population growth: pre-1800–1880; 1890s; 1910–1960; 1970–2010

Subdivisions: One city; six villages; three CDPs; 16 townships

National Register listings: 45

Pre-1940 residences (estimated): 6,551 (20.5%)
Pre-1940 housing survival rate: 50%
Pre-1860 housing survival rate (1940): 22.5%

Farm housing in disrepair (1950): 18.9%

Nonfarm housing in disrepair (1950): 10.4%

Average farmhouse value (1930): $1,278
Average outbuilding value (1930): $1,006

Average farmhouse size (1940): 5.3 rooms
Number of farms (1920): 2,949
Average farm size (1920): 92.5 acres
Sources of settlement: Virginia, Pennsylvania, and Germany
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Chillicothe

Namesake: The Chalahgawtha branch of the Shawnee people

Founding: 1796 (platting); 1799 (post office); 1802 (incorporation)

Population (2020): 22,059

Population (historic): 2,426 (1820); 7,100 (1850); 10,938 (1880); 12,976 (1900); 18,340 (1930)

Periods of population growth: pre-1820–1940; 1950s; 2000–2020
Pre-1940 residences (estimated): 3,513 (33.6%)
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Outstanding Buildings

1. Washington Mains Farm (c. 1870). 243 Dwyer Road. Buckskin. Second Empire.
2. John Irwin Farm (c. 1825). 626 Irwin Lane. Buckskin.
3. David Coyner House (c. 1870). 2687 State Route 28. Buckskin. Italianate.
4. Simon Clouser House (1806). Wisecup Hill Road, east of Morgan Road. Buckskin.
5. Jesse Spencer House (c. 1835). 18904 State Route 327. Colerain. Federal. Razed.
6. *Applethorpe / John Buchwalter Farm (1840). 290 Whisler Road. Colerain. Greek Revival.
7. Abraham Buchwalter Farm (1824). 7687 State Route 180. Colerain. Federal.
8. Jacob Hickle Farm (c. 1875). 241 Whisler Road. Colerain. Italianate.
9. *Concord Presbyterian Church (1822/1880s). 498 Acton Road. Concord. Gothic Revival.
10. *Charles Briggs Farm (c. 1865). 1626 Austin Road. Concord. Greek Revival/Italianate.
11. Farm (c. 1890). 7340 Austin–Good Hope Road. Concord. Queen Anne.
12. Henry Slagle House (c. 1860). 839 Douglas Road. Concord. Greek Revival/Italianate.
13. William Cochran House (c. 1830). 551 Jamison Road. Concord. Razed.
14. *Cyrus Hegler Farm (1854). 592 Old US Highway 35. Concord. Greek Revival. Burned.
15. Albert Peterson Farm (c. 1875). 4500 Old US Highway 35. Concord. Italianate.
16. *Samuel Porter House (c. 1845). 1026 Ragged Ridge Road. Concord. Greek Revival.
17. *Adam Mallow Farm (1827). 3969 US Highway 35. Concord. Greek Revival.
18. *John Cline House (1856). Westfall Road, northeast of Simmons Road. Concord. Greek Revival. Razed.
19. Brown's Methodist Chapel (1871). 2009 Brown's Chapel Road. Deerfield. Gothic Revival.
20. Archibald Thomas Farm (c. 1865). 6866 Frankfort–Clarksburg Pike. Deerfield. Italianate.
21. Farm (c. 1880). 2661 Mile Tree Road. Deerfield. Italianate.
22. John Timmons Farm (1873). 17917 State Route 138. Deerfield. Italianate.
23. Clement Brown Farm (1868). 7087 State Route 207. Deerfield. Italianate.
24. James Tootle House (c. 1830). 14839 Westfall Road. Deerfield. Federal.
25. Thomas Brown Farm (c. 1830). 7072 Williamsport Pike. Deerfield. Federal.
26. Nelson Brown House (c. 1825). 7640 Williamsport Pike. Deerfield. Federal.
27. *Thomas Foster Farm (c. 1855). 2810 Higby Road. Franklin. Greek Revival.
28. *Sylvester Higby House (1857). 3987 Higby Road. Franklin. Greek Revival.
29. *Judiah Higby House (1856). 4462 Higby Road. Franklin. Greek Revival.
30. Samuel May Farm (c. 1830). 176 Jadwin Road. Green. Federal.
31. *William Guthrie House (1817). Robinson Road, west of Marietta Road. Green. Federal.
32. Lincoln Delano Farm (c. 1865). 6186 State Route 159. Green. Gothic Revival.
33. *Zimaroy Downs House (c. 1880). 6305 State Route 159. Green. Gothic Revival.
34. *John Crouse House (c. 1800/1836). 6633 State Route 159. Green.
35. David Crouse Farm (c. 1870). 9107 State Route 159. Green. Italianate.
36. Milton McCoy House (c. 1870). 150 State Route 180. Green. Italianate.
37. Abraham Holman Farm (c. 1860). 4781 State Route 180. Green. Greek Revival.
38. *Abraham Jones Farm (1854). 446 Zane Trace Road. Green. Greek Revival.
39. *James Steel House Ruins (c. 1830). North of Reub Hill Road. Huntington. Federal.
40. *Jacob Rittenour Farm (1852). 33647 Old US Highway 35. Jefferson. Greek Revival.
41. *Daniel Peterman House (c. 1850). 250 County Road 900. Liberty. Greek Revival. Razed.
42. *Highbank Farm / Harness–Vause Farm (c. 1802/1884). 28532 Old US Highway 35. Liberty. Italianate.
43. Jacob Mace House (c. 1830). 29086 Old US Highway 35. Liberty.
44. *John Wheeler Farm (c. 1870). 29774 US Highway 50. Liberty. Italianate.
45. John Erskine Farm (c. 1830). 30993 US Highway 50. Liberty. Greek Revival.
46. Levi Jones Farm (c. 1860). 4639 Vigo Road. Liberty. Italianate.
47. Simon Ratcliff Farm (c. 1855). Vigo Road, south of 36175 US Highway 50. Liberty.
48. William Jones House (1856). 4787 West Junction Road. Liberty. Italianate.
49. Daniel Pricer House (1816). 232 Pricer Ridge Road. Paint. Razed.
50. *John Moomaw House (c. 1820). Upper Twin Road and Strouse Lane. Paint. Razed.
51. *Christian Benner House (c. 1805). 213 South Benner Hill Road. Paxton.
52. *Mahlon Ferneau House (c. 1895). 1564 State Route 41. Paxton. Romanesque.
53. Austin Pepple Farm (c. 1860). 2150 US Highway 50. Paxton. Italianate.
54. Nathaniel Massie Farm (1800). 2862 US Highway 50. Paxton.
55. *Reeves–Kent Farm (1805). 6344 US Highway 50. Paxton.
56. *William Blackstone House (c. 1840). US Highway 50 and Seip Mound. Paxton. Greek Revival.
57. *Adena / Thomas Worthington Estate (1806–1807). 847 Adena Road. Scioto. Federal.
58. *Matthew Cook House (c. 1840). 331 Cook's Hill Road. Scioto. Greek Revival.
59. *George Dun House (1838–1840). 400 Dun Road. Scioto.
60. *John Patton House (1801/1857). 1538 Grubb Road. Scioto.
61. *George Renick House (1804). 17 Mead Drive. Scioto.
62. *Thomas Steel Log House (c. 1825). 1444 Plyley's Lane. Scioto.
63. *George Steel House (c. 1825/1865). 3656 Polk Hollow Road. Scioto. Italianate.
64. Massie House (c. 1845). 1344 North Bridge Street. Springfield. Greek Revival.
65. *Thomas Jones Farm (c. 1845). 3110 Charleston Pike. Springfield.
66. *Wesley Chapel (1888). 64 Main Street. Springfield. Gothic Revival.
67. George Baum Farm (c. 1855). 661 Baum Hill Road. Twin. Greek Revival.
68. *John Reed Farm (c. 1855). 10527 US Highway 50. Twin. Greek Revival.
69. *John Barger Farm (c. 1835). 12381 US Highway 50. Twin. Federal. Razed.
70. David Breedlove Farm (c. 1865). 14308 US Highway 50. Twin. Italianate.
71. *North Fork Presbyterian Church (1871). 19013 US Highway 50. Twin. Romanesque.
72. Edgar Haynes House (c. 1810). 8601 Upper Twin Road. Twin. Razed.
73. McMillen Farm (c. 1855). 10849 Upper Twin Road. Twin. Italianate.
74. *Levi Anderson House (c. 1826/1840). 428 Anderson Station Road. Union. Greek Revival.
75. *John Anderson House (1893). 1680 Andersonville Road. Union. Queen Anne.
76. *James Dunlap House (1815/1850s). Infirmary Lane. Union.
77. John Abernathy House (c. 1865). 770 Larrick Lane. Union. Italianate.
78. *Henry Mace House (c. 1840). 17380 State Route 104. Union. Federal.
79. George Sowerby House (c. 1875). 3799 State Route 207. Union. Italianate.
80. *John Tootle House (c. 1835). 6602 State Route 207. Union. Federal.