Miami County on the map of Ohio 2025. Cities, roads, borders and directions in Miami County of Ohio.

USA / Ohio / Miami County

Miami County is situated in the western part of Ohio. This well known county was named after Miami Indians. The area of Miami County is about 407.04 square miles. The county, established on Mar 1, 1807 from Montgomery County, and it is populated today by 109 thousand residents. Troy is the county seat of Miami County. This map shows the borders of Miami County as well as neighboring counties, including major highways and natural objecsts as of 2025. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Miami County.

The borders of Miami County over the map of Ohio

An image of Miami County, OH

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