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Montana County Map

Montana County Map

About the map

Montana Map Extent

This Montana county map displays its 56 counties. Because the Missouri River cuts through Montana from east to west, it helps delineate several county boundaries.

The county with the highest population in Montana is Yellowstone County. Despite the name, it’s not actually home of Yellowstone National Park. That would be Gallatin County and Park County.

The least populated county is Petroleum County with just over 400 residents. If you compare its population to all counties in the United States, it has the seventh-fewest people. For size, Beaverhead County has the largest area occupying 5573.4 square miles. But the smallest county is Silver Bow County, just northeast of Beaverhead County. The area for Silver Bow County is just 718.9 square miles.

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Montana county map

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