Miami County Map, Ohio

Written and Fact-checked by | Updated On: April 30, 2026 | 13:31 ET

Map of Miami County - Miami County is a county located in the U.S. state of Ohio. Miami County Map showing cities, highways, important places and water bodies. Get Where is Miami County located in the map, major cities in Miami county, population, areas, and places of interest.

Map of Miami County, Ohio

Map of Miami County, Ohio

About Miami County Map, Ohio: The map showing the county boundary, county seat, major cities, highways, water bodies and neighbouring counties.

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About Miami County, Ohio

Miami County is a county located in the U.S. state of Ohio. It's county seat is Troy. As per 2020 census, the population of Miami County is 109264 people and population density is square miles. According to the United States Census Bureau, the county has a total area of 407.04 sq mi (1,054 km2). Miami County was established on -33907.

Miami County Facts

ContinentNorth America
CountryUnited States
StateOhio
County SeatTroy
Largest City/TownTroy
EstablishedMarch 1, 1807
Total Area410 sq mi (1,062 sq km)
Land Area407 sq mi (1,054 sq km)
Water Area2.3 sq mi (6.0 sq km)
Population109,333 (Census 2020)
Population Density268 people per sq mi
Time ZoneEastern Time Zone (ET)
Major HighwaysI-75, US-36, State Route 55, State Route 41, State Route 48, State Route 201
Neighboring CountiesShelby County, Logan County, Champaign County, Clark County, Montgomery County, Darke County
Famous ForAviation history, Troy Strawberry Festival, agriculture
Top AttractionsTroy Historic Square, Charleston Falls Preserve, Eldean Covered Bridge, Waco Air Museum
Official Websitehttps://www.miamicountyohio.gov/

Cities and Towns in Miami County, Ohio

  • Troy (county seat) – 26,305 (Census 2020)
  • Piqua – 20,570 (Census 2020)
  • Tipp City – 10,274 (Census 2020)
  • West Milton – 4,782 (Census 2020)

Roads and Highways in Miami County, Ohio

Miami County is well connected by highways that link it to Dayton and other parts of western Ohio.

  • I-75 – major north-south interstate connecting Toledo to Cincinnati through Troy and Piqua
  • US-36 – east-west route linking Piqua to Urbana and Greenville
  • State Route 55 – connects Troy to Springfield and surrounding areas
  • State Route 41 – runs through northern parts of the county linking communities
  • State Route 48 – connects Tipp City to Dayton and northwestern Ohio
  • State Route 201 – links Piqua to rural areas and neighboring counties

Neighboring Counties of Miami County

  • Shelby County (north)
  • Logan County (east)
  • Champaign County (southeast)
  • Clark County (south)
  • Montgomery County (southwest)
  • Darke County (west)

Top Attractions in Miami County, Ohio

Miami County offers historic sites, outdoor recreation, and community events.

  • Troy Historic Square – vibrant downtown area with shops and events
  • Charleston Falls Preserve – scenic nature preserve with waterfalls and trails
  • Eldean Covered Bridge – historic wooden bridge and local landmark
  • Waco Air Museum – aviation museum showcasing early aircraft history
  • Piqua Historical Area – features museums and historic buildings
  • Great Miami River Recreation Trail – popular for biking and walking
  • Johnston Farm & Indian Agency – historic site with educational exhibits
  • Troy Strawberry Festival – annual event attracting visitors from across the region

Distance from Miami County to Nearby Cities

  • Miami County to Dayton – 20 mi (32 km)
  • Miami County to Columbus – 75 mi (121 km)
  • Miami County to Cincinnati – 80 mi (129 km)
  • Miami County to Toledo – 130 mi (209 km)
  • Miami County to Springfield – 25 mi (40 km)

FAQs about Miami County

Where is Miami County located?

Miami County is located in western Ohio, north of Dayton.

What is Miami County known for?

It is known for aviation history, the Troy Strawberry Festival, and agriculture.

What is the population of Miami County?

The population was 109,333 according to the 2020 Census.

What is the county seat of Miami County?

The county seat is Troy.

Are there attractions in Miami County?

Yes, the county offers historic sites, parks, trails, and annual events.