All United States parks designated National Parks and most National Monuments are maintained by the National Park Service of the United States which also maintains several other types of protected areas of the United States:
National Parks
As of 2005, there are 58 officially-designated National Parks in the United States and its dependent areas.
(See also List of U.S. national parks by state, List of U.S. national parks by date established)
Disbanded National Parks
National Monuments
National Historical Parks, Memorials, and Battlefields
National Recreation Areas, Lakeshores, Seashores and Trails
Other NPS Preserves and Protected Areas
The National Park Service also administers some National Wild and Scenic Rivers while the Bureau of Land Management, U.S. Forest Service, U.S. Fish and Wildlife Service and various state or local agencies administer other rivers.
The National Park Service also provides limited assistance to National Heritage Areas.
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