Madison County, Ohio

Madison County
Madison County Courthouse
Flag of Madison County
Official seal of Madison County
Map of Ohio highlighting Madison County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Coordinates: 39°54′N 83°24′W / 39.9°N 83.4°W / 39.9; -83.4
Country United States
State Ohio
FoundedFebruary 16, 1810[1][2]
Named forJames Madison[3]
SeatLondon
Largest cityLondon
Area
 • Total467 sq mi (1,210 km2)
 • Land466 sq mi (1,210 km2)
 • Water0.8 sq mi (2 km2)  0.2%
Population
 (2020)
 • Total43,824 Increase
 • Density94/sq mi (36/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district15th
Websitewww.co.madison.oh.us

Madison County is a county located in the central portion of the U.S. state of Ohio. As of the 2020 census, the population was 43,824.[4] Its county seat is London.[5] The county is named for James Madison, President of the United States and was established on March 1, 1810.[6] Madison County is part of the Columbus, OH Metropolitan Statistical Area.

  1. ^ "Madison County Online Services". Madison County, Ohio. Archived from the original on March 7, 2011. Retrieved August 26, 2010.
  2. ^ Williams, James (1887). The revised statutes of the state of Ohio, Volume 3. The Wrighton Printing Company. p. 583.
  3. ^ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. U.S. Government Printing Office. p. 196.
  4. ^ "2020 Population and Housing State Data". Census.gov. Retrieved January 12, 2022.
  5. ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  6. ^ "Madison County data". Ohio State University Extension Data Center. Retrieved April 28, 2007.[dead link]