United States

United States
Vector file created by Dbenbenn, Zscout370, Jacobolus, Indolences, and Technion. · Public domain · source
Conventional long name	United States of America
Common name	United States
Capital	Washington, D.C.
Largest city	New York City
Official languages	None at federal level
Government type	Federal presidential constitutional republic
President	Joe Biden
Vice president	Kamala Harris
Legislature	United States Congress
Upper house	United States Senate
Lower house	United States House of Representatives
Sovereignty type	Independence
Established event1	Declaration of Independence
Established date1	July 4, 1776
Established event2	Constitution
Established date2	September 17, 1787
Area km2	9,833,520
Population estimate	334,000,000+
Currency	United States dollar
Time zones	UTC−12 to UTC+12 (territories)
Drives on	Right
Calling code	+1
Iso3166	USA

United States is a federal republic primarily located in North America, composed of 50 states, a federal district, and several territories. It emerged from thirteen British colonies in the 18th century and has since become a major continental power with significant influence in international institutions and global affairs. The country features vast geographic and climatic diversity, a multicultural population, and a leading role in science, technology, finance, and culture.

Etymology

The name "United States" derives from the term used in the Declaration of Independence and the Articles of Confederation, reflecting the union of formerly separate British colonies such as Massachusetts Bay Colony, Virginia Colony, and Province of Pennsylvania. Early uses appear in documents tied to the Continental Congress and figures like John Adams and Thomas Jefferson. The adjective "American" traces to Amerigo Vespucci and became attached to inhabitants and cultural identity in writings by Benjamin Franklin and Noah Webster.

History

European contact accelerated after voyages by Christopher Columbus and later colonization by Spanish Empire, France, and the Netherlands, producing settlements like St. Augustine, Florida, Quebec City, and New Amsterdam. The thirteen British colonies, including Maryland, North Carolina, and Georgia, developed representative institutions and economies tied to trade with Kingdom of Great Britain. Tensions over taxation and governance culminated in the American Revolutionary War and the Treaty of Paris (1783), leading to independence. The United States Constitution replaced the Articles of Confederation and established federal structures, influenced by thinkers such as Montesquieu and political experiments in Pennsylvania and Virginia.

Expansion across the continent involved purchases and conflicts: the Louisiana Purchase, Annexation of Texas, and the Mexican–American War extended territory to the Pacific; the Louisiana Purchase reshaped relations with Napoleonic France. The institution of slavery and divergent regional economies led to the American Civil War following events like the Missouri Compromise and the election of Abraham Lincoln; the Emancipation Proclamation and Thirteenth Amendment abolished slavery. Reconstruction, the Gilded Age, and industrialization saw rise of figures and movements such as Frederick Douglass, Andrew Carnegie, and Labor unions.

The United States' international role expanded through the Spanish–American War, entry into World War I under Woodrow Wilson, and leadership in World War II following the attack on Pearl Harbor. Postwar institutions like the United Nations, International Monetary Fund, and North Atlantic Treaty Organization reflected American engagement. The Cold War with the Soviet Union shaped interventions, the Marshall Plan, and competitions exemplified by the Space Race and missions such as Apollo 11. Domestic movements including the Civil Rights Movement led by figures like Martin Luther King Jr. and legal milestones such as Brown v. Board of Education transformed society. Late 20th- and early 21st-century events include the end of the Cold War, the September 11 attacks, military campaigns like the War in Afghanistan (2001–2021) and the Iraq War, and economic and technological shifts driven by companies such as Apple Inc., Microsoft, and Google LLC.

Geography

Spanning from the Atlantic Ocean to the Pacific Ocean and including borders with Canada and Mexico, the country includes continental states, island territories like Puerto Rico and Guam, and the federal district Washington, D.C.. Major physiographic regions include the Appalachian Mountains, Interior Plains, Rocky Mountains, Great Lakes, and the Alaska Range. Significant rivers include the Mississippi River, Missouri River, and Colorado River; notable lakes include Lake Superior and Lake Michigan. Geological features and events such as the Mississippi River Delta formation and earthquake zones in California and Alaska shape landscapes. The nation’s extensive coastline and maritime zones support ports like Port of Los Angeles and Port of New York and New Jersey.

Climate

Climatic zones range from Arctic conditions in Alaska to tropical climates in Hawaii and Puerto Rico, with temperate and continental climates across the continental interior and Mediterranean climate in parts of California. Influences include the Gulf Stream, El Niño–Southern Oscillation, and seasonal shifts like tornado alley dynamics. Weather extremes include hurricanes from the Atlantic hurricane season, blizzards in the Northern Plains, and droughts in the American Southwest. Regional variability affects agriculture in areas such as the Midwest and viticulture in Napa Valley.

Environment and biodiversity

Ecosystems range from the tundra of Alaska and boreal forests to temperate rainforests in Olympic National Park and subtropical wetlands like the Everglades National Park. Species include iconic fauna such as the American bison, bald eagle, and marine mammals along coasts. Conservation frameworks include protected areas administered by National Park Service, U.S. Fish and Wildlife Service, and statutes like the Endangered Species Act. Environmental challenges include habitat loss, invasive species such as zebra mussel, pollution events, and climate change impacts addressed in programs involving agencies like the Environmental Protection Agency.

Government and politics

The federal system divides authority between national institutions and constituent states such as California, Texas, and New York. National institutions include the executive led by the President, the bicameral United States Congress with the United States Senate and United States House of Representatives, and the Supreme Court of the United States. Political parties such as the Democratic Party and the Republican Party dominate electoral politics, while institutions like state legislatures, governors, and local governments execute policy. Landmark legal texts include the United States Constitution and amendments such as the First Amendment to the United States Constitution and Fourteenth Amendment to the United States Constitution.

Foreign relations and defense

Foreign policy has involved alliances and multilateral engagement with bodies such as the United Nations and NATO, relations with major powers including China, Russia, and European Union member states, and bilateral partnerships with countries like Japan and United Kingdom. Defense is organized under the United States Department of Defense and services including the United States Army, United States Navy, United States Air Force, and United States Marine Corps. Nuclear posture is shaped by the United States nuclear arsenal and arms control agreements such as the New START treaty. Intelligence and security involve agencies like the Central Intelligence Agency and National Security Agency.

Law and justice

The legal system is rooted in Common law traditions and codified through federal statutes, state laws, and case law from courts including the Supreme Court of the United States. Landmark judicial decisions such as Marbury v. Madison and Roe v. Wade (later affected by Dobbs v. Jackson Women's Health Organization) have shaped constitutional interpretation. Criminal justice institutions include federal agencies like the Federal Bureau of Investigation and state and local law enforcement; corrections systems vary among states. Civil liberties are protected by amendments and enforced through litigation in federal and state courts.

Administrative divisions

Primary subnational units comprise 50 states such as Florida and Illinois, a federal district Washington, D.C., and inhabited territories including Puerto Rico, Guam, U.S. Virgin Islands, American Samoa, and Northern Mariana Islands. States are subdivided into counties or equivalents like parishes and boroughs, and municipalities such as Los Angeles and Chicago provide local governance. Intergovernmental relations involve compacts, federal grants, and institutions like the National Governors Association.

Economy

The national economy features sectors led by finance in Wall Street, technology hubs like Silicon Valley, manufacturing centers in the Rust Belt and Sun Belt, and resource industries in regions such as Permian Basin and Appalachian Basin. Major institutions include the Federal Reserve System and regulatory agencies like the Securities and Exchange Commission. Trade is substantial with partners including China, Canada, and Mexico and governed by agreements such as the United States–Mexico–Canada Agreement. Corporations like Amazon (company), Walmart, and ExxonMobil are significant employers and global actors. Economic indicators track GDP, unemployment, inflation, and fiscal policy debates in institutions such as the Congressional Budget Office.

Infrastructure

Critical infrastructure spans energy networks including interstate grids and facilities like Hoover Dam, telecommunications giants such as AT&T and Verizon Communications, and water systems serving metropolitan areas like New York City. The electrical system includes regional operators and entities like the Federal Energy Regulatory Commission. Energy production includes fossil fuels from regions like Texas and renewable deployment in wind corridors and solar arrays in Arizona. Broadband expansion, resilience against events like Hurricane Katrina, and investment in modernization are ongoing policy priorities.

Demographics

The population is diverse, shaped by waves of migration from Europe, Africa, Asia, and the Americas, with major immigrant groups from Mexico, China, India, and the Philippines. Urbanization centers include New York City, Los Angeles, and Chicago, while metropolitan areas such as Dallas–Fort Worth and Atlanta have grown rapidly. Demographic trends involve aging populations, fertility changes, and internal migration to states like Florida and Texas. Statistical agencies like the United States Census Bureau produce decennial counts that determine apportionment and federal funding.

Society and culture

Cultural influence is transmitted through literature by authors such as Mark Twain and Toni Morrison, music movements like jazz and hip hop, and film industries centered in Hollywood. Social movements including women's suffrage and LGBT rights transformed civic life, while institutions like the Smithsonian Institution curate national heritage. Diverse cuisines reflect immigrant contributions from Italy, China, Mexico, and West Africa, and holidays such as Thanksgiving and Independence Day mark national traditions.

Religion

Religious landscape includes denominations such as Roman Catholic Church, Southern Baptist Convention, and movements like The Church of Jesus Christ of Latter-day Saints. Freedom of religion is enshrined in the First Amendment to the United States Constitution, and religious pluralism includes communities of Judaism, Islam, Buddhism, Hinduism, and indigenous spiritual traditions. Religious organizations often engage in education, health care, and social services through institutions like Catholic hospitals and faith-based charities.

Education

Primary and secondary education is administered by local school districts with standards influenced by state departments and initiatives like the No Child Left Behind Act and Every Student Succeeds Act. Higher education features public systems such as the University of California and private research universities including Harvard University, Massachusetts Institute of Technology, and Stanford University. Research funding flows through agencies such as the National Institutes of Health and the National Science Foundation, supporting work at institutions like Johns Hopkins University.

Health care

Health care delivery involves private providers, public programs like Medicare and Medicaid, and hospitals including Mayo Clinic and Cleveland Clinic. Regulatory frameworks are enforced by agencies such as the Food and Drug Administration and policy debates address insurance coverage, pharmaceutical costs, and public health responses guided by the Centers for Disease Control and Prevention. Major public health events include the 1918 influenza pandemic and the COVID-19 pandemic, which mobilized federal and state responses.

Science and technology

Scientific achievements include space exploration via NASA missions such as Apollo program and Mars rovers, foundational research at national labs like Los Alamos National Laboratory, and innovations from companies including Intel Corporation and Tesla, Inc.. Nobel laureates in fields like physics and medicine have affiliations with universities such as Princeton University and University of California, Berkeley. Technology clusters in regions like Boston and Silicon Valley drive advances in biotechnology, AI research at institutions like OpenAI and enterprise software from Oracle Corporation.

Transportation

Transportation networks comprise interstate highways such as the Interstate Highway System, rail corridors like those served by Amtrak, major airports including Hartsfield–Jackson Atlanta International Airport and Los Angeles International Airport, and freight systems relying on class I railroads like Union Pacific Railroad. Urban transit systems include the New York City Subway and Bay Area Rapid Transit; ports such as Port of Los Angeles support global trade. Policy and infrastructure investment involve agencies like the Department of Transportation.

Media

Media landscape includes legacy outlets such as The New York Times, The Washington Post, and broadcast networks like CBS, NBC, and ABC. Cable and digital platforms including CNN, Fox News Channel, and online services from Netflix and YouTube shape public discourse. Public broadcasting is represented by entities like National Public Radio and the Public Broadcasting Service; regulatory oversight historically involved the Federal Communications Commission.

Sports

Popular sports include American football with leagues such as the National Football League, baseball exemplified by Major League Baseball, basketball with the National Basketball Association, and ice hockey via the National Hockey League. Collegiate athletics governed by NCAA are culturally significant, and international competitions feature U.S. participation in events like the Olympic Games. Iconic venues include Madison Square Garden and Wembley Stadium hosts involving transatlantic tournaments; notable athletes include Michael Jordan, Serena Williams, and Tom Brady.

Symbols and national identity

National symbols include the flag, the Great Seal of the United States, and monuments such as the Statue of Liberty and the Lincoln Memorial. Cultural artifacts like The Star-Spangled Banner and the Pledge of Allegiance contribute to national identity, while civic rituals occur at sites such as United States Capitol and during ceremonies like presidential inaugurations, reflecting continuity and contested meanings in public life.

Category:Countries