Champaign County, Ohio

Founding: 1805
Parent counties: Franklin and Greene

Namesake: The French word champagne ("plain")
Seat: Springfield (1805–1807); Urbana (1807–)

Land area: 429 square miles

Population (2020): 38,714

Population (historic): 6,303 (1810); 19,782 (1850); 27,817 (1880); 26,642 (1900); 24,103 (1930)

Periods of population growth: pre-1810–1880; 1930–2010

Subdivisions: One city; six villages; one CDP; 12 townships

Pre-1940 residences (estimated): 4,799 (28.7%)
Pre-1940 housing survival rate: 68.5%
Pre-1860 housing survival rate (1940): 22.7%

Farm housing in disrepair (1950): 6%

Nonfarm housing in disrepair (1950): 7.9%

Average farmhouse value (1930): $1,683
Average outbuilding value (1930): $1,718
Average farmhouse size (1940): 7 rooms
Number of farms (1920): 2,481
Average farm size (1920): 89.1 acres
Sources of settlement: Virginia, Pennsylvania, Ireland, New York, and Kentucky
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Urbana

Named for: Unclear—likely derived from the Latin word urbs ("city")

Founding: 1805 (platting); 1809 (post office); 1865 (incorporation)

Population (2020): 11,115

Population (historic): 644 (1820); 3,429 (1860); 6,808 (1900); 7,742 (1930)

Periods of population growth: 1805–1830; 1840–1910; 1920–1970; 1980–2010
Pre-1940 residences (estimated): 1,978 (35.5%)
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