Historical territories of the United States

Historical territories of the United States
Name	Territories of the United States (historical)
Caption	Seal of the United States Department of the Interior
Established	1607–present
Population	Varied

Contents

Historical territories of the United States describe the succession of colonial claims, continental acquisitions, organized territories, unorganized regions, insular possessions, and transitional jurisdictions that preceded or existed alongside United States statehood. These territories encompass claims by Jamestown colonists, transfers under the Louisiana Purchase, the aftermath of the Mexican–American War, outcomes of the Spanish–American War, and treaties such as the Treaty of Paris (1783), the Adams–Onís Treaty, and the Treaty of Guadalupe Hidalgo. The territorial framework shaped institutions like the Northwest Ordinance, the Philippine Commission, the Department of the Interior, and the United States Congress's plenary power.

Overview and definitions

Territory designations arose in contexts including colonial charters issued by monarchs like James I of England and claims by entities such as the Virginia Company of London, the Massachusetts Bay Company, and the Dutch West India Company. Continental expansions followed diplomatic acts including the Treaty of Utrecht (1713), the Treaty of Paris (1763), and the Louisiana Purchase negotiated with Napoleon Bonaparte. Distinctions among Oregon Country, Territory of Orleans, Utah Territory, and Arizona Territory reflect categories recognized by statutes such as the Northwest Ordinance and congressional enabling acts debated in the United States Senate and the United States House of Representatives.

Early claims derived from imperial competitions involving Spain, France, England, the Dutch Republic, and Sweden in regions like New Spain, New France, New Netherland, and New Sweden. Settlements at Jamestown and Plymouth Colony established English footholds while the Acadian Expulsion and the Seven Years' War reshaped possession maps culminating in the Treaty of Paris (1763). Post-Revolution arrangements in the Treaty of Paris (1783) and policies like the Northwest Ordinance organized the Northwest Territory, the Southwest Territory, and later the Territory of Orleans. The Louisiana Purchase (1803) from Napoleonic France doubled continental reach and incubated regions later organized as the Missouri Territory, Arkansas Territory, and Iowa Territory after events such as the Missouri Compromise debated in the United States Senate.

Congress created organized territories with executive governance structures exemplified by the Territory of Michigan, the Territory of Wisconsin, the Territory of Minnesota, and the Alaska Territory following the Alaska Purchase. Legislative milestones—Enabling Act of 1802, Kansas–Nebraska Act, and admission acts for Ohio, Iowa, Wisconsin, Minnesota, Oregon—guided transitions to statehood. Unorganized expanses like Unorganized Territory in the Great Plains and claims from the Adams–Onís Treaty produced jurisdictions such as Florida Territory and Territory of Orleans. Judicial rulings by the Supreme Court of the United States in cases like Dred Scott v. Sandford and statutes enacted during the administrations of presidents including Thomas Jefferson, Andrew Jackson, and Abraham Lincoln influenced territorial governance.

The Spanish–American War concluded with the Treaty of Paris (1898), ceding Puerto Rico, the Philippines, and Guam to the United States. The Treaty of Paris (1898) and subsequent agreements with the Kingdom of Hawaiʻi (overthrown with involvement of figures like Sanford B. Dole) produced annexations leading to the Territory of Hawaii. The Philippine–American War and commissions such as the Philippine Commission administered the Philippine Islands before Philippine independence under the Tydings–McDuffie Act. The Guano Islands Act fueled claims in the Caroline Islands, Mariana Islands, and Wake Island. Twentieth-century arrangements created insular entities including the United States Virgin Islands (purchase from Denmark), American Samoa (treaty with Tonga and agreements with Germany), and the Commonwealth of Puerto Rico under United States statutes and Supreme Court decisions collectively known as the Insular Cases.

Territorial administration involved offices such as the territorial governor, legislative assemblies, and federal departments including the Department of the Interior and the Department of War. Legal frameworks were defined by statutes like the Northwest Ordinance, the Organic Act for territories such as Oklahoma Territory and Territory of New Mexico, and Supreme Court of the United States opinions in the Insular Cases that distinguished "incorporated" from "unincorporated" territories. Political movements—statehood advocates, territorial delegates in the United States House of Representatives, and litigants in cases such as Downes v. Bidwell—shaped rights questions about United States citizenship under laws like the Naturalization Act and the Jones–Shafroth Act.

Admission processes employed enabling acts, constitutional conventions, and ratifications exemplified by Colorado, Oklahoma, Arizona, and New Mexico. Boundary disputes resolved by treaties and arbitration—Webster–Ashburton Treaty, Oregon Treaty, decisions by the International Court of Justice precursor bodies, and negotiations after the Mexican–American War—altered maps, as did purchases like the Gadsden Purchase. The transition of the Territory of Alaska to statehood followed congressional debates and the Alaska Statehood Act, while the path for Puerto Rico and Guam has involved referendums, acts of Congress, and executive orders during administrations from William McKinley to Franklin D. Roosevelt and beyond.

Territorial legacies persist in contemporary controversies involving Puerto Rico statehood, Chamorro people advocacy in Guam, indigenous claims by Lakota and Navajo Nation authorities, and historic grievances tied to the Trail of Tears, Indian Removal Act, and treaties such as Treaty of Fort Laramie (1868). Cultural impacts appear in literature by Mark Twain, cartography by Washington Irving era chroniclers, legal scholarship from figures like Ruth Bader Ginsburg and cases housed in the United States Supreme Court, and heritage preservation by the National Park Service at sites including Fort Laramie National Historic Site and Alcatraz Island. Ongoing international and domestic disputes reference the Insular Cases, congressional authority under the Territorial Clause, and movements involving organizations such as the Organization of American States and advocacy groups like the American Civil Liberties Union.