Adams County, Ohio

Founding: 1797
Parent counties: Hamilton and Washington

Namesake: John Adams, U.S. president
Seats: Manchester (1797); Adamsville (1798); Washington (1799–1804); West Union (1804–)

Land area: 584 square miles

Population (2020): 27,477

Population (historic): 3,432 (1800); 13,183 (1840); 20,750 (1870); 26,328 (1900); 20,381 (1930)

Periods of population growth: pre-1800–1900; 1930s; 1970–2010

Subdivisions: Six villages; two CDPs; 15 townships

National Register listings: 17

Pre-1940 residences (estimated): 2,040 (15.8%)
Pre-1940 housing survival rate: 39.5%
Pre-1860 housing survival rate (1940): 18.2%

Farm housing in disrepair (1950): 21.9%

Nonfarm housing in disrepair (1950): 17.2%

Average farmhouse value (1930): $752
Average outbuilding value (1930): $590
Average farmhouse size (1940): 5.7 rooms
Number of farms (1920): 3,650
Average farm size (1920): 58.7 acres
Sources of settlement: Pennsylvania, Virginia, Northern Ireland, and Kentucky
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West Union

Namesake: Unknown

Founding: 1804 (platting); 1805 (post office); 1859 (incorporation)

Population (2020): 3,004

Population (historic): 229 (1810); 444 (1850); 1,033 (1900); 1,094 (1930)

Periods of population growth: 1804–1840; 1850–1910; 1920–1990; 2000s

Pre-1940 residences (estimated): 122 (7.9%)

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Outstanding Buildings

1. Solomon Gore House (c. 1855). 3378 State Route 73. Bratton. Greek Revival.
2. *Peter Wickerham Inn (1801). 28136 State Route 41. Franklin.
3. *Jesse Kendall Farm (c. 1880). 29894 State Route 41. Franklin. Italianate.
4. *William Kenyon House (c. 1870). 617 Sandy Springs Lane. Green.
5. *Thomas Kirker Farm (1805/1852). 6620 State Route 136. Liberty.
6. *Shoemaker–Sproull Farm (c. 1796/1825). 425 Fawcett Road. Meigs.
7. *Isaac Aerl House (1809/1880s). 27217 State Route 41. Meigs.
8. *Buckeye Station / Nathaniel Massie House (1797). Buckeye Station Road. Monroe. Ruined.
9. *Oliver Tompkins House (c. 1840). 1580 Gift Ridge Road. Monroe. Greek Revival.
10. *John Wilson House (1836/1842). 92 Old State Route 32. Scott.
11. Alexander McCreight House (c. 1820). State Route 770, north of Watt–Young Road. Scott. Razed.
12. *Andrew Ellison House (1798). 3626 Logan's Lane. Tiffin Township
13. Daniel Collier Log House (1802). Spurgeon Hill Road, northeast of Lafferty Road. Tiffin. Razed.
14. *John Treber Inn (1798/1810). 17759 State Route 41. Tiffin.
15. William Grooms Farm (c. 1870). 10829 State Route 125. Tiffin.
16. William Cluxton Log House. 1021 Unity Road. Tiffin. Razed.