Four federal agencies of the United States government administer the U.S. Wildernesses, which includes 759 Wildernesses and . These agencies are:
*United States Forest Service
*United States National Park Service
*United States Bureau of Land Management
*United States Fish and Wildlife Service
This is an area larger than Iraq or the state of California. In Alaska, there are of wilderness. This represents about 52% of the wilderness area in the United States. The National Park Service (NPS) has oversight of of wilderness at 60 locations. The U.S. Fish and Wildlife Service has responsibility for in 71 areas. The Bureau of Land Management (BLM) oversees at 222 unique sites. The Department of Agriculture, the U.S. Forest Service oversees of wilderness areas in 442 areas. Some wilderness areas are managed by multiple agencies, so the above totals exceed the actual number of units (759) in the system. In addition, some of the 60 NPS areas with wilderness have multiple units designated as such (for example, Lake Mead National Recreation Area).
Some areas are designated wilderness by state or tribal governments. These are not governed by the Federal National Wilderness Preservation System.
The following sortable table lists all U.S. areas that have been designated by the United States Congress under the Wilderness Act. The listed designation date is the date that the wilderness was signed into law. Some areas have been expanded or otherwise changed since the original designation date. For more information about a specific area, see the wilderness name link.
*List of largest wilderness areas in the United States
*List of U.S. National Forests
*List of U.S. National Parks
*United States National Monument
*List of miscellaneous U.S. public areas
*Intact forest landscape
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