Uninhabited islands of the United States

Uninhabited islands of the United States
Name	Uninhabited islands of the United States
Location	United States
Total islands	various
Population	0 (seasonal or transient)

Uninhabited islands of the United States are landmasses within the sovereign territory, territorial waters, or insular areas of the United States that lack a permanent resident population, including many islands in the Aleutian Islands, Hawaiian Islands, Virgin Islands (U.S.), Puerto Rico, Guam, Northern Mariana Islands, American Samoa, Great Lakes, Florida Keys, Pacific Ocean, and Atlantic Ocean. These islands range from tiny islets and shoals to large volcanic or glacial islands and are notable for their roles in conservation movement, navigation (maritime), military history of the United States, natural resource management, and territorial disputes with neighboring states and territories.

Overview and Definition

Definitions of "uninhabited" vary among the United States Census Bureau, United States Geological Survey, National Oceanic and Atmospheric Administration, United States Fish and Wildlife Service, and territorial governments such as the Commonwealth of Puerto Rico and governments of the Territory of Guam and the Northern Mariana Islands. Some islands like Baker Island, Howland Island, Palmyra Atoll, Navassa Island, and Wake Island are designated by federal agencies as uninhabited or without a civilian population, while islands such as Monomoy Island and Block Island may have seasonal researchers or transient staff from institutions like the Smithsonian Institution, National Park Service, U.S. Fish and Wildlife Service, U.S. Coast Guard, and National Oceanic and Atmospheric Administration. Legal definitions affect inclusion under statutes such as the Insular Cases legacy and administration by entities including the Department of the Interior, National Park Service, U.S. Fish and Wildlife Service, and the United States Department of Defense.

Geographic Distribution by Region

Uninhabited islands occur across multiple U.S. regions: the subarctic Aleutian Islands chain including Attu Island and surrounding Pribilof Islands; the tropical Hawaiian Islands chain with remote atolls like Laysan Island and Midway Atoll; the Caribbean territories including Culebra outlying islets and Saint John environs in the U.S. Virgin Islands; the western Pacific possessions such as Wake Island, Johnston Atoll, Kingman Reef, and Jarvis Island; the insular areas of the Northern Mariana Islands and American Samoa; Atlantic and Gulf Coast islands like Bird Key, Shell Island, and Pelican Island; and freshwater islands within the Great Lakes such as Gull Island (Lake Michigan) and Sister Islands (Lake Superior). These distributions intersect with maritime features like continental shelf, exclusive economic zone, and historic shipping lanes charted by the United States Coast Survey.

Ecology and Wildlife

Many uninhabited islands serve as critical habitats for endemic and migratory species protected under laws and programs like the Endangered Species Act, the Migratory Bird Treaty Act, and management plans of the National Wildlife Refuge System. Islands such as Bald Head Island alternatives and sanctuaries harbor seabird colonies including brown booby, Laysan albatross, and sooty tern, while atolls like Palmyra Atoll and Midway Atoll support coral reef ecosystems monitored by the Coral Reef Conservation Program and researchers from the Scripps Institution of Oceanography and Woods Hole Oceanographic Institution. Flora on remote islands includes endemic taxa studied by botanists affiliated with the Hawaii Department of Land and Natural Resources and the Smithsonian Institution Tropical Research Institute, while invasive species eradication campaigns involving The Nature Conservancy, U.S. Fish and Wildlife Service, and local conservation NGOs target rats, feral cats, and nonnative plants to restore native bird and plant populations.

History and Human Use

Although currently uninhabited, many islands have histories involving Indigenous peoples of the Americas, Polynesian navigation, European colonization of the Americas, Spanish Empire, British Empire, United States expansionism, and 19th–20th century activities such as guano mining under the Guano Islands Act and military use during the World War II and the Cold War. Sites like Navassa Island and Baker Island were claimed under the Guano Islands Act of 1856, contested in disputes involving the Republic of Haiti and corporate interests like the Atlantic and Pacific Guano Company. Military installations and airfields on Wake Island, Midway Atoll, and Attu Island reflect strategic roles in the Battle of Midway, the Aleutian Islands Campaign, and subsequent United States civil-military relations over basing and cleanup. Archeological and ethnographic research ties to institutions such as the Bureau of Indian Affairs, National Park Service, and university departments document precontact occupation patterns and historic use by mariners and traders.

Legal Status and Ownership

Ownership and jurisdictional status vary: some islands are federal property administered by the United States Fish and Wildlife Service (e.g., Palmyra Atoll National Wildlife Refuge), the National Park Service (e.g., Channel Islands National Park outlying lands), the Department of Defense (e.g., Wake Island), or held in trust by territorial governments like the Commonwealth of the Northern Mariana Islands or the Territory of American Samoa. International law aspects involve the United Nations Convention on the Law of the Sea principles affecting exclusive economic zone claims and continental shelf delineation, while domestic statutes such as the Antiquities Act and executive orders create protected areas and wildlife refuges. Disputes over islands have involved litigation in U.S. courts and diplomacy with nations such as Haiti, United Kingdom, and Japan.

Conservation and Management

Management strategies combine federal regulations, cooperative agreements with NGOs like The Nature Conservancy and Audubon Society, and research partnerships with universities including University of Hawaii at Manoa and University of Alaska Fairbanks. Conservation measures include invasive species eradication, habitat restoration funded by programs like the National Fish and Wildlife Foundation, and designation of marine protected areas under frameworks established by the Marine Mammal Protection Act and the National Marine Sanctuaries Act. Long-term monitoring programs involve satellite telemetry coordinated by agencies such as the NOAA Fisheries Office and collaborative initiatives like the Island Conservation partnership to prioritize islands for intervention.

Access and Tourism Restrictions

Access to many uninhabited islands is restricted for safety, conservation, or security reasons; restrictions are enforced by agencies including the U.S. Coast Guard, National Park Service, U.S. Fish and Wildlife Service, and the Department of Defense. Some islands, such as Monomoy Island National Wildlife Refuge and portions of the Channel Islands National Park, allow guided visits or seasonal permits administered through reservation systems tied to federal agencies and local authorities like the Commonwealth of Puerto Rico Department of Natural and Environmental Resources, while others like Baker Island and Howland Island are closed to the public except for authorized scientific missions coordinated with the United States Fish and Wildlife Service and international research partners. Violations can invoke statutes including the Migratory Bird Treaty Act and federal trespass laws adjudicated in federal courts.

Category:Islands of the United States Category:Uninhabited islands