Marion County on the map of Indiana 2022. Cities, roads, borders and directions in Marion County of Indiana.

USA / Indiana / Marion County

Marion County is the most populous county of Indiana, located around Indianapolis, its county seat. The total area of Marion County is about 403 square miles, and the population is one million residents. This map shows the borders of Marion County as well as neighboring counties, including major highways and natural objecsts as of 2022. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it.


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The borders of Marion County over the map of Indiana

An image of Marion County, IN

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