Montgomery County, Ohio

Founding: 1803
Parent county: Hamilton

Namesake: Richard Montgomery, Continental Army general
Seat: Dayton (1803–)

Land area: 462 square miles

Population (2020): 537,309

Population (historic): 7,722 (1810); 31,938 (1840); 64,006 (1870); 130,146 (1900); 273,481 (1930)

Periods of population growth: pre-1810–1970

Subdivisions: 17 cities; five villages; one CDP; nine townships

Pre-1940 residences (estimated): 41,989 (16.5%)
Pre-1940 housing survival rate: 48.3%
Pre-1860 housing survival rate (1940): 26.2%

Farm housing in disrepair (1950): 3.4%

Nonfarm housing in disrepair (1950): 5.1%
Average farmhouse value (1930): $2,480
Average outbuilding value (1930): $1,784

Average farmhouse size (1940): 6.5 rooms
Number of farms (1920): 4,460
Average farm size (1920): 49.6 acres
Sources of settlement: Pennsylvania, Maryland, Germany, Virginia, and New Jersey
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Dayton

Namesake: Jonathan Dayton, New Jersey politician

Founding: 1796 (platting); 1803 (post office); 1805 (incorporation)

Population (2020): 137,644

Population (historic): 383 (1810); 6,067 (1840); 30,473 (1870); 85,333 (1900); 200,982 (1930)

Periods of population growth: pre-1810–1960
Pre-1940 residences (estimated): 29,264 (39.2%)
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Outstanding Buildings

1. John Furnas House (c. 1845). 1269 Furnas Road. Butler.
2. John Beard Farm (1846). 3677 Mulberry Road. Butler. Razed.
3. James Patty House (c. 1845). Patty's Road, west of Frederick Pike. Butler. Razed.
4. Jacob Lasure House (1863). 241 Arlington Road. Clay.
5. David Rohr House (1873/1890s). 1201 West Market Street. German. Italianate/Queen Anne.
6. John Stump Farm (1817). 11345 Oxford Road. German. Federal.
7. Jacob Koehne House (1853). 11011 State Route 725. German. Greek Revival.
8. Daniel Miller House (1808). 3525 Courtwood Avenue. Harrison. Federal.
9. Joseph Kennedy House (c. 1845). 5180 Frederick Pike. Harrison. Greek Revival. Ruined.
10. Jacob Mumma House (c. 1865). 2239 Kipling Drive. Harrison.
11. Daniel Recher Farm (c. 1835/1875). 7275 Dayton–Farmersville Road. Jefferson. Italianate.
12. Lewis Kemp House (1806/1832). 4800 Burkhardt Road. Mad River.
13. George Harshman House (c. 1855). 5201 Hubertville Avenue. Mad River. Greek Revival.
14. David Heck House (c. 1840). 9537 Dayton Pike. Madison. Greek Revival.
15. John Fryman House (1831). 3300 Diamond Mill Road. Madison.
16. Farm (c. 1875). 7835 Old Dayton Road. Madison. Italianate.
17. Farm (c. 1890). 7680 Wolf Creek Pike. Madison. Italianate/Queen Anne.
18. Joseph Snyder House (c. 1835). Wolf Creek Pike. Madison. Classical Revival. Razed.
19. Robert Mitchell House (c. 1875). 2673 Austin Road. Miami. Second Empire. Razed.
20. Jacob Overholser Farm (c. 1840). 9630 Diamond Mill Road. Randolph.
21. Benjamin Krug House (1880). 3473 Sweet Potato Ridge Road. Randolph.
22. Jonathan Watkins House (c. 1804/1812). 9950 Lebanon Pike. Washington.
23. John Harris House (c. 1810). 1243 East Social Row Road. Washington.
24. Robert Bradford House (1839). 1284 East Social Row Road. Washington. Federal.
25. Daniel Arnold Farm (1836). 7800 Shull Road. Wayne. Federal.
26. Joseph Arnold Farm (c. 1845). 7900 Shull Road. Wayne.
27. Joseph McElhenney House (1874). 7373 Taylorsville Road. Wayne. Gothic Revival.

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