Ottawa County, Ohio

Founding: 1840
Parent counties: Erie, Lucas, and Sandusky

Namesake: The Ottawa people
Seat: Port Clinton (1840–)

Land area: 255 square miles

Population (2020): 40,364

Population (historic): 2,248 (1840); 7,016 (1860); 19,762 (1880); 22,213 (1900); 24,109 (1930)

Periods of population growth: pre-1840–1910; 1920–1980; 1990–2010

Subdivisions: One city; seven villages; three CDPs; 12 townships

Pre-1940 residences (estimated): 5,601 (20%)
Pre-1940 housing survival rate: 67.6%
Pre-1860 housing survival rate (1940): 10.4%

Farm housing in disrepair (1950): 5.3%

Nonfarm housing in disrepair (1950): 5.6%

Average farmhouse value (1930): $2,143
Average outbuilding value (1930): $1,852
Average farmhouse size (1940): 7 rooms
Number of farms (1920): 2,010
Average farm size (1920): 58.3 acres
Sources of settlement: Germany, New York, and Pennsylvania
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Port Clinton

Namesake: DeWitt Clinton, New York governor

Founding: 1828 (platting); 1840 (post office); 1871 (incorporation)

Population (2020): 6,025

Population (historic): 249 (1850); 543 (1870); 2,049 (1890); 3,007 (1910); 4,408 (1930)

Periods of population growth: pre-1850–1980; 2010s

Pre-1940 residences (estimated): 1,021 (29.7%)
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