Putnam County, Ohio

Founding: 1834 (declared in 1820)
Parent county: Unorganized territory

Namesake: Israel Putnam, Continental Army general
Seats: Kalida (1834–1866); Ottawa (1866–)

Land area: 483 square miles

Population (2020): 34,451

Population (historic): 5,189 (1840); 17,081 (1870); 32,525 (1900); 25,074 (1930)

Periods of population growth: 1830–1900; 1940–2000

Subdivisions: 15 villages; one CDP; 15 townships

National Register listings: 10

Pre-1940 residences (estimated): 3,641 (26.5%)
Pre-1940 housing survival rate: 56%
Pre-1860 housing survival rate (1940): 8.8%

Farm housing in disrepair (1950): 2.8%

Nonfarm housing in disrepair (1950): 4.5%

Average farmhouse value (1930): $1,507
Average outbuilding value (1930): $1,770
Average farmhouse size (1940): 7 rooms
Number of farms (1920): 3,232
Average farm size (1920): 80.3 acres
Sources of settlement: Germany, Pennsylvania, Switzerland, and Wales
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Ottawa

Namesake: The Ottawa tribe

Founding: 1833 (platting); 1839 (post office); 1861 (incorporation)

Population (2020): 4,456

Population (historic): 104 (1850); 1,293 (1880); 2,322 (1900); 2,169 (1930)

Periods of population growth: pre-1880–1900; 1930–1960; 1970–2010
Pre-1940 residences (estimated): 446 (21.9%)
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Outstanding Buildings

1. *Nicholas Schroeder House (c. 1860). 13251 Road I. Greensburg. Razed.
2. *Gerhart Meyer Farm (c. 1860). 11598 Road 10K. Ottawa. Greek Revival.
3. *John Moening House (c. 1860). 12141 Road 11. Ottawa.
4. *Our Lady of Good Counsel Convent (1853). 12341 Road J. Ottawa.
5. *Holy Family Catholic Church (1915). 7359 State Route 109. Ottawa. Romanesque.
6. *Michael Bridenbaugh Farm (c. 1880). 14282 Road 6. Riley.
7. *John Clevenger House (1848). 17656 Road 16O. Sugar Creek. Razed.
8. *Evan Reynolds Farm (c. 1895). 17249 Road 17N. Sugar Creek. Eastlake.
9. *Robert Roberts House (1898). 16433 Old State Route 12. Sugar Creek. Queen Anne.
10. *Risser House (c. 1905). 20901 State Route 115. Sugar Creek. Classical Revival.
11. *Benjamin Clevenger House (1876). 16619 Road 16O. Union. Gothic Revival.