Madison County, Ohio
Madison County, Ohio | |
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Flag Seal | |
Location within the U.S. state of Ohio | |
| Coordinates: 39°54′N 83°24′W / 39.9°N 83.4°W | |
| Country | United States |
| State | Ohio |
| Founded | February 16, 1810 |
| Named after | James Madison |
| Seat | London |
| Largest city | London |
| Area | |
• Total | 467 sq mi (1,210 km2) |
| • Land | 466 sq mi (1,210 km2) |
| • Water | 0.8 sq mi (2.1 km2) 0.2% |
| Population (2020) | |
• Total | 43,824 |
| • Density | 94/sq mi (36/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 15th |
| Website | www |
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. Its county seat is London. The county is named for James Madison, President of the United States and was established on March 1, 1810. Madison County is part of the Columbus, OH Metropolitan Statistical Area.