Champaign County, Ohio
| Champaign County, Ohio | ||
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Champaign County Courthouse in Urbana
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 Location in the U.S. state of Ohio |
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 Ohio's location in the U.S. |
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| Founded | March 1, 1805 | |
| Named for | "plain" in French | |
| Seat | Urbana | |
| Largest city | Urbana | |
| Area | ||
| • Total | 430 sq mi (1,114 km2) | |
| • Land | 429 sq mi (1,111 km2) | |
| • Water | 1.2 sq mi (3 km2), 0.3% | |
| Population | ||
| • (2010) | 40,097 | |
| • Density | 94/sq mi (36/km²) | |
| Congressional district | 4th | |
| Time zone | Eastern: UTC-5/-4 | |
| Website | www |
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Champaign County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 40,097. Its county seat is Urbana. The county takes its name from the French word for "open level country".
Champaign County comprises the Urbana, OH Micropolitan Statistical Area, which is also included in the Dayton-Springfield-Sidney, OH Combined Statistical Area.
According to the U.S. Census Bureau, the county has a total area of 430 square miles (1,100 km2), of which 429 square miles (1,110 km2) is land and 1.2 square miles (3.1 km2) (0.3%) is water.
As of the census of 2000, there were 38,890 people, 14,952 households, and 10,870 families residing in the county. The population density was 91 people per square mile (35/km²). There were 15,890 housing units at an average density of 37 per square mile (14/km²). The racial makeup of the county was 95.73% White, 2.30% Black or African American, 0.31% Native American, 0.25% Asian, 0.02% Pacific Islander, 0.31% from other races, and 1.08% from two or more races. 0.69% of the population were Hispanic or Latino of any race.
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