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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Outstanding Buildings

Gideon Hart House (c. 1820). 636 Hempstead Road. Blendon.
Ebenezer Washburn House (1833). 675 Sunbury Road. Blendon.
Timothy Lee House (1824). 1100 Sunbury Road. Blendon. Greek Revival.
John McDannald House (c. 1860). 5847 Sunbury Road. Blendon. Italianate. Razed.
Calvin McDannald House (c. 1880). 5187 Westerville Road. Blendon. Italianate.
John Huffman House (1823–1825). 1350 Dyer Road. Franklin. Razed.
Christian Herr Farm (1890). 1451 Rathmell Road. Hamilton. Queen Anne.
Washington Rees Farm (c. 1840/1870). 5001 Rees Road. Hamilton. Eclectic.
Theodore Leithart House (c. 1876). 2650 Columbus Street. Jackson. Italianate.
John Brown House (c. 1880). 1571 Dyer Road. Jackson. Italianate.
John Breckinridge House (c. 1875). 4259 Jackson Pike. Jackson. Italianate.
Ephraim Borror Farm (c. 1875). Jackson Pike, south of Hibbs Road. Jackson. Italianate. Razed.
David Headley House (c. 1875). 6976 Clark State Road. Jefferson. Italianate.
Isaac Souder House (1837). 6020 Havens Corners Road. Jefferson.
Joshua Stevenson Farm (c. 1835). 5101 Bowen Road. Madison. Federal.
Charles Pontius House (c. 1830). 7785 Braun Road. Madison.
John Stevenson House (1859). 4901 Ebright Road. Madison. Italianate.
George Long Farm (c. 1845). 5411 Elder Road. Madison. Greek Revival.
John Rager Farm (c. 1840/1910). 8020 Groveport Road. Madison.
Seymour Farm (c. 1890). 6269 Lithopolis Road. Madison. Eastlake.
William Whaley Farm (c. 1825). 8677 Oregon Road. Madison.
Howard Deen House (c. 1885). 1891 Sunbury Road. Mifflin. Italianate.
Frederick Agler House (1824). 2621 Sunbury Road. Mifflin. Federal.
Evan Jones House (c. 1880). 3240 Alton–Darby Creek Road. Norwich. Italianate.
Wesley Chapel Methodist Church (1891). 3299 Dublin Road. Norwich. Gothic Revival.
Henry McCracken House (c. 1840). 3983 Dublin Road. Norwich.
Samuel Davis House (1816). 4264 Dublin Road. Norwich. Federal.
St. James Lutheran Church (1871). 5660 Trabue Road. Norwich. Gothic Revival.
John Kenny House (c. 1840). 3730 Kennybrook Lane. Perry. Federal.
Zadok Vesey House (c. 1835). 5961 East Livingston Avenue. Truro. Greek Revival.
Joseph Thompson House (c. 1885). 5051 Brand Road. Washington. Italianate. Razed.
Asher Brand Farm (1867). 5281 Brand Road. Washington. Italianate.
Benjamin Sells Farm (1837–1842). 4586 Hayden Run Road. Washington. Greek Revival.