 A large portion of the area is the Grayling outwash plain, a broad outwash plain including sandy ice-disintegration ridges; jack pine barrens, some white pine-red pine forest, and northern hardwood forest.Large lakes were created by glacial action.As of the 2010 United States Census there were 16,571 people, 6,428 households, and 4,634 families residing in the county.