Washington County, Ohio

Founding: 1788
Parent county: Unorganized territory

Namesake: George Washington, U.S. president
Seat: Marietta (1788–)

Land area: 632 square miles

Population (2020): 59,711

Population (historic): 5,427 (1800); 20,823 (1840); 43,244 (1880); 48,245 (1900); 42,437 (1930)

Periods of population growth: pre-1800–1880; 1890s; 1930–1980; 1990s

Subdivisions: Two cities; five villages; six CDPs; 22 townships

Pre-1940 residences (estimated): 6,164 (21.9%)
Pre-1940 housing survival rate: 52.6%
Pre-1860 housing survival rate (1940): 14.1%

Farm housing in disrepair (1950): 11.7%

Nonfarm housing in disrepair (1950): 10.8%

Average farmhouse value (1930): $963
Average outbuilding value (1930): $658
Average farmhouse size (1940): 6.1 rooms
Number of farms (1920): 4,204
Average farm size (1920): 57.6 acres
Sources of settlement: Germany, Pennsylvania, Virginia, Connecticut, New York, and Scotland
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Marietta

Namesake: Unclear—perhaps Marie Antoinette, French queen

Founding: 1788 (platting); 1794 (post office)

Population (2020): 13,385

Population (historic): 321 (1800); 3,175 (1850); 5,444 (1880); 13,348 (1900); 14,285 (1930)

Periods of population growth: 1788–1900; 1910s; 1930–1960
Pre-1940 residences (estimated): 2,913 (45.1%)
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Outstanding Buildings

1. William Long Log House. 1335 Cat's Creek Road. Adams.
2. Jonathan Sprague House (1800). 12091 Muskingum River Road. Adams.
3. John Mason Farm (c. 1830). 14430 State Route 60. Adams. Federal.
4. Jonathan Stone House (1799). 612 Blennerhasset Avenue. Belpre. Federal.
5. Walter Curtis Farm (1827). 851 Newbury Road. Belpre.
6. William Smith House (1870). 8768 State Route 55. Decatur.
7. Richard Irvine House (c. 1860). 561 Veto Road. Decatur.
8. Francis Collins Farm (c. 1855). 49995 State Route 7. Grandview. Italianate.
9. Ernst Waernicke Farm (1864). 1375 Upper Archer's Fork Road. Independence. Greek Revival.
10. William Hune House (1865/1878). 18445 State Route 26. Lawrence. Greek Revival.
11. Charles Cisler House (1879). 1206 Glendale Road. Marietta. Eastlake.
12. Baldwin House (1815/1835). 350 Ash Road. Muskingum. Federal.
13. Russell House (c. 1820). 545 Masonic Park Lane. Muskingum. Federal.
14. Joseph Barker House (1811). 1903 Masonic Park Lane. Muskingum. Federal.
15. James Wood Farm (c. 1840). 3800 Muskingum River Road. Muskingum. Greek Revival.
16. Chamberlain House (1904). 6 Ness Place. Muskingum. Classical Revival.
17. Lowell House (c. 1895). 4340 State Route 60. Muskingum. Classical Revival.
18. Daniel Greene House (c. 1825). 38484 State Route 7. Newport. Federal.
19. Joseph Barker House (1832). State Route 7. Newport. Federal.
20. Robert Hanna Log House. 704 Bender Road. Warren.
21. Augustus Bailey House (c. 1855). 1300 Blue Knob Road. Warren. Italianate/Gothic Revival.
22. Benjamin Dana House (1818). 18206 State Route 60. Waterford. Federal.
23. George Gordon Farm (c. 1855). 1485 State Route 83. Waterford.
24. Simeon Deming House (1815). 525 Kern Road. Watertown. Federal.
25. St. John Catholic Church (1866–1867). 17784 State Route 676. Watertown. Romanesque.

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