Madison County, Ohio

Founding: 1810
Parent county: Franklin

Namesake: James Madison, U.S. president
Seat: London (1810–)

Land area: 466 square miles

Population (2020): 43,824

Population (historic): 1,603 (1810); 9,025 (1840); 15,633 (1870); 20,590 (1900); 20,253 (1930)

Periods of population growth: pre-1810–1880; 1890s; 1920–2020

Subdivisions: One city; five villages; three CDPs; 14 townships

National Register listings: 11

Pre-1940 residences (estimated): 3,096 (19.5%)
Pre-1940 housing survival rate: 60.2%
Pre-1860 housing survival rate (1940): 20.9%

Farm housing in disrepair (1950): 7.6%

Nonfarm housing in disrepair (1950): 9.8%

Average farmhouse value (1930): $1,711
Average outbuilding value (1930): $1,561
Average farmhouse size (1940): 6.1 rooms
Number of farms (1920): 1,769
Average farm size (1920): 147.6 acres
Sources of settlement: Virginia, Ireland, Maryland, Pennsylvania, and Vermont
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London

Namesake: London, England

Founding: 1810 (platting); 1813 (post office); 1831 (incorporation)

Population (2020): 10,279

Population (historic): 132 (1820); 1,152 (1860); 3,067 (1880); 3,511 (1900); 4,141 (1930)

Periods of population growth: 1810–2020
Pre-1940 residences (estimated): 1,144 (24.7%)
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Outstanding Buildings

1. *James Bradley Farm (c. 1860). 3200 Guy Avenue. Canaan. Italianate. Razed.
2. *House (c. 1880). 7200 Price–Hilliards Road. Canaan. Italianate.
3. *John Price Farm (1871). 7040 US Highway 42. Canaan. Italianate.
4. William Curtain Farm (c. 1870). 2980 State Route 142. Deer Creek. Gothic Revival.
5. Stutson House (c. 1870). 4790 State Route 142. Deer Creek. Italianate.
6. *Wilson House (c. 1890). 380 Old US Highway 42. Deer Creek. Chateauesque.
7. Thomas Wilson Farm (1856). 1060 US Highway 42. Deer Creek. Classical Revival.
8. Farm (c. 1910). 460 State Route 38. Deer Creek. Classical Revival.
9. Elijah Chenoweth Farm (c. 1875). 6970 Big Plain–Circleville Road. Fairfield. Italianate.
10. *William Pringle House (1865–1867). 8500 Big Plain–Circleville Road. Fairfield. Italianate.
11. Farm (c. 1875). 975 Middle Pike. Jefferson. Italianate.
12. *Joseph Williams Farm (c. 1860). 7165 Rosedale–Milford Center Road. Monroe. Italianate/Gothic Revival.
13. *David Bradley Log House (c. 1820). 4018 Lafayette–Plain City Road. Monroe.
14. *Caleb Morse House (1823). 11060 Rosedale–Milford Center Road. Pike.
15. *James O'Day Farm (c. 1875). 8699 State Route 323. Pleasant. Gothic Revival. Razed.
16. *Valentine Wilson House (c. 1818). State Route 58, north of I-70. Somerford. Razed.
17. *David Selsor Farm (c. 1860). 2479 Selsor–Moon Road. Stokes. Greek Revival/Gothic Revival.
18. *Reuben Slaughter Farm (c. 1860). 13830 State Route 729. Stokes. Italianate/Gothic Revival.
19. Harrold Farm (c. 1835?). 10678 State Route 41. Stokes. Razed.
20. Fulton Armstrong House (c. 1835). 7810 Armstrong Road. Union.
21. *David Tway Farm (c. 1865). 4790 State Route 38. Union. Greek Revival/Gothic Revival.