Miami County, Ohio

Miami County
County courthouse in Troy
County courthouse in Troy
Flag of Miami County
Official seal of Miami County
Map of Ohio highlighting Miami County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Coordinates: 40°03′N 84°14′W / 40.05°N 84.23°W / 40.05; -84.23
Country United States
State Ohio
FoundedMarch 1, 1807[1]
Named forMiami people
SeatTroy
Largest cityTroy*
Area
 • Total410 sq mi (1,100 km2)
 • Land407 sq mi (1,050 km2)
 • Water3.1 sq mi (8 km2)  0.8%
Population
 (2020)
 • Total108,774
 • Density270/sq mi (100/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts8th, 15th
Websitewww.miamicountyohio.gov

Miami County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 108,774.[2] Its county seat is Troy.[3] The county is named in honor of the Miami people.[4] Miami County is part of the Dayton, OH Metropolitan Statistical Area.

  1. ^ "Ohio County Profiles: Miami County" (PDF). Ohio Department of Development. Archived from the original (PDF) on June 21, 2007. Retrieved April 28, 2007.
  2. ^ 2020 census
  3. ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  4. ^ "Miami County". Ohio History Central. Retrieved March 18, 2020.