Franklin County, Ohio

Founding: 1803
Parent county: Ross

Namesake: Benjamin Franklin, Founding Father
Seats: Franklinton (1803–1824); Columbus (1824–)

Land area: 532 square miles

Population (2020): 1,323,807

Population (historic): 3,486 (1810); 42,909 (1850); 86,797 (1880); 164,460 (1900); 361,055 (1930)

Periods of population growth: pre-1810–2020

Subdivisions: 16 cities; 10 villages; five CDPs; 17 townships

Pre-1940 residences (estimated): 60,679 (11.4%)
Pre-1940 housing survival rate: 53.1%
Pre-1860 housing survival rate (1940): 20.1%

Farm housing in disrepair (1950): 7.9%

Nonfarm housing in disrepair (1950): 5.2%

Average farmhouse value (1930): $2,531
Average outbuilding value (1930): $1,952
Average farmhouse size (1940): 6.4 rooms
Number of farms (1920): 3,778
Average farm size (1920): 70.2 acres
Sources of settlement: Germany, Pennsylvania, Virginia, Ireland, New York, Maryland, England, and New Jersey
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Columbus

Namesake: Christopher Columbus, Italian explorer

Founding: 1812 (platting); 1813 (post office); 1816 (incorporation)

Population (2020): 905,748

Population (historic): 2,435 (1830); 18,554 (1860); 51,647 (1880); 125,560 (1900); 290,564 (1930)

Periods of population growth: pre-1830–2020
Pre-1940 residences (estimated): 46,576 (12.1%)
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