Islands of the United States

Islands of the United States
Name	Islands of the United States
Location	United States
Major islands	Aleutian Islands, Hawaiian Islands, Puerto Rico, Long Island (New York), Kodiak Island

Contents

Islands of the United States are the insular territories, archipelagos, and coastal islands under the sovereignty of the United States and its constituent states of the United States, territories of the United States, and associated jurisdictions such as Puerto Rico and the United States Virgin Islands. These islands range from volcanic chains like the Hawaiian Islands and the Aleutian Islands to continental shelf features like Long Island (New York) and barrier islands along the Atlantic Ocean and Pacific Ocean. Their geographic distribution, political arrangements, ecological diversity, and historical roles connect to events and institutions including the Louisiana Purchase, the Spanish–American War, and the United Nations trusteeship debates.

Geography and distribution

The geographic distribution encompasses the North American continent margins, the Caribbean Sea, the northern Pacific Ocean, and the subarctic Bering Sea, linking island sets such as the Florida Keys, the Channel Islands of California, the Aleutian Islands, the Hawaiian Islands, and the insular possessions of the Territories of the United States. Many islands are part of state jurisdictions like Alaska and Hawaii (U.S. state), while others belong to territories including Guam, American Samoa, Northern Mariana Islands, and Puerto Rico. Oceanographic features such as the Continental shelf, the Gulf Stream, and the Pacific Plate influence island formation alongside volcanic processes exemplified by Mauna Loa, Kīlauea, and Mount Cleveland (Alaska). Climatological patterns from the Gulf of Mexico to the Bering Strait create distinct biogeographic zones that overlap with migratory corridors like those used under agreements such as the Migratory Bird Treaty.

Islands operate under a variety of legal regimes including state sovereignty for islands in New York (state), California, and Alaska, territorial status for Puerto Rico, the United States Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands, and federal administration for national assets such as National Park Service sites and National Wildlife Refuge System units. Constitutional questions have arisen in cases litigated before the Supreme Court of the United States and in statutes like the Insular Cases precedents and the Organic Act of Guam, while political movements in Puerto Rico have led to plebiscites engaging parties such as the New Progressive Party (Puerto Rico) and federal lawmakers including members of the United States House of Representatives. International agreements such as the Compact of Free Association and historical treaties like the Treaty of Paris (1898) shaped sovereignty and governance of insular possessions.

Major groups include the Hawaiian Islands (with Oʻahu, Hawaii (island), Maui (island), Kauaʻi), the Aleutian Islands (including Unalaska, Attu Island), the Kodiak Archipelago (including Kodiak Island), the Channel Islands of California (including Santa Cruz Island (California), Santa Rosa Island (California)), the Florida Keys (including Key West), the Territories of the United States clusters (Puerto Rico with Vieques, Culebra, Isla de Mona), United States Virgin Islands (including Saint Thomas, Saint John (U.S. Virgin Islands), Saint Croix), Guam, and American Samoa (including Tutuila). Urban and historical islands include Manhattan, Long Island (New York), Martha's Vineyard, Nantucket, and strategic sites such as Wake Island, Midway Atoll, and Pearl Harbor.

Human settlement histories span indigenous cultures like the Aleut people, Native Hawaiian people, Chamorro people, Taino people, and Samoan people through European contact events including voyages by Christopher Columbus, expeditions by James Cook, and colonial contests enacted in the Spanish–American War and the American Revolution. Strategic uses of islands appear in military events such as the Attack on Pearl Harbor, the Battle of Midway, and the Aleutian Islands campaign (1942–1943), while colonization and economic exploitation involved entities like the Hudson's Bay Company and plantation systems in Hawaii (island) and Puerto Rico. Demographic shifts, migration linked to the Great Migration (African American) and labor movements including Asian immigration to the United States influenced island societies, and modern political developments include decolonization debates in the United Nations and local referendums in Puerto Rico and the Northern Mariana Islands.

Island ecosystems host endemic taxa such as Hawaiian honeycreepers, Galápagos-like analogs in evolutionary studies, threatened species like the Hawaiian monk seal, the Kemp's ridley sea turtle, and avifauna protected under the Migratory Bird Treaty Act; they face invasive species challenges exemplified by brown tree snake impacts on Guam and rats on Aleutian Islands. Conservation frameworks include the National Park Service units (e.g., Denali National Park and Preserve connections through Alaska), the National Wildlife Refuge System (including Kodiak National Wildlife Refuge), international designations such as Ramsar Convention wetland sites, and regional collaborations involving the U.S. Fish and Wildlife Service and nongovernmental organizations like The Nature Conservancy. Climate change effects documented by the Intergovernmental Panel on Climate Change threaten low-lying islands in the Caribbean Sea and Pacific Ocean, prompting resilience planning tied to agencies such as the Federal Emergency Management Agency.

Island economies are diverse: tourism centers like Maui (island), Key West, and Puerto Rico rely on hospitality linked to airlines including Hawaiian Airlines and cruise operators such as Carnival Corporation; fisheries off New England and the Bering Sea involve fleets regulated by the National Oceanic and Atmospheric Administration and managed through laws like the Magnuson–Stevens Fishery Conservation and Management Act; and strategic infrastructure includes Naval Station Pearl Harbor, Andersen Air Force Base, and ports like San Juan, Puerto Rico. Transportation networks combine ferries operated by agencies such as the Washington State Ferries, inter-island air services like Cape Air, and major seaports connected to the Panama Canal trade routes, while economic policy debates engage the United States Congress and federal agencies including the Department of Transportation.