The U.S. government is 237 years old in 2026, counting from March 1789, when the federal government under the current Constitution began operating. If you’re asking how old the country is rather than the government that runs it, the answer is 250, measured from the Declaration of Independence on July 4, 1776. Both numbers are correct; they answer different questions.
Why 1789 Is the Government’s Real Start Date
The Constitution on paper became a working government on March 4, 1789, when the first federal Congress convened at Federal Hall in New York City.1National Archives. The First Federal Congress George Washington took the oath of office as the first President on April 30, 1789, activating the executive branch.2National Archives. Transcription: Washingtons Inaugural Address Congress passed the Judiciary Act on September 24, 1789, creating the federal court system, and the Supreme Court held its first session on February 1, 1790, in New York.3Supreme Court of the United States. The Court as an Institution
Within about a year, all three branches were operating. Every federal law passed, every executive action taken, and every Supreme Court ruling issued since then traces its authority back to that founding period. From March 1789 to 2026 is 237 years of continuous operation.
Why 1776 Answers a Different Question
The Continental Congress adopted the Declaration of Independence on July 4, 1776, formally severing political ties with Great Britain.4Office of the Historian. The Declaration of Independence, 1776 That is the birth date of the nation as a sovereign country, and it’s the number Americans reach for on the Fourth of July. In 2026 the country marks its semiquincentennial, the 250th anniversary of independence, with a commemoration planned by the U.S. Semiquincentennial Commission that Congress established in 2016.5America250. America250
Declaring independence and building a functioning government, though, were separate projects. In 1776 the priority was winning a war.
The Thirteen-Year Gap: The Articles of Confederation
Between 1776 and 1789 the country ran on a different framework. The Articles of Confederation, ratified on March 1, 1781, served as the first written charter of government.6GovInfo. Articles of Confederation Historical Background They bound the states into what the document called “a firm league of friendship,”7Avalon Project. Articles of Confederation but left each state with enormous autonomy. The central government couldn’t levy taxes, couldn’t regulate interstate trade, and had no executive branch or national court system to enforce anything.
Shays’ Rebellion in 1786, an armed uprising of debt-burdened farmers in western Massachusetts, exposed the weakness. Congress couldn’t raise troops to respond. On February 21, 1787, Congress called a convention of state delegates to Philadelphia, ostensibly to revise the Articles. Delegates went further and wrote a new constitution instead, signing it on September 17, 1787.8National Archives. Constitution of the United States (1787) New Hampshire’s ratification on June 21, 1788 made it the ninth state to approve, meeting the threshold and ending government under the Articles.9Ben’s Guide to the U.S. Government. States and Dates of Ratification The new government took office the following spring.
Because the Articles government and the constitutional government are structurally different systems, most measurements of “how old the U.S. government is” start in 1789 rather than 1776 or 1781.
Twenty-Seven Amendments, Same Government
The Constitution has been amended twenty-seven times since 1789, but the framework itself has never been replaced. The Bill of Rights, the first ten amendments, was ratified on December 15, 1791.10National Archives. Bill of Rights (1791) Later amendments abolished slavery, guaranteed voting rights regardless of race or sex, established the income tax, and imposed term limits on the presidency. The most recent, the Twenty-Seventh, was ratified in 1992.
Amendments require a two-thirds vote in both chambers of Congress and ratification by three-fourths of the state legislatures, currently 38 of 50. That difficulty is part of why the same 1789 government still runs the country: it can change without being scrapped and rebuilt.
The Civil War Did Not Reset the Clock
The most serious threat to continuous operation came when eleven southern states attempted to secede between 1860 and 1861. If secession had been legally valid, you could argue the government fractured and reconstituted. The Supreme Court settled the question in Texas v. White (1869), ruling that “the Constitution, in all its provisions, looks to an indestructible Union composed of indestructible States.”11Justia Supreme Court Center. Texas v. White, 74 U.S. 700 (1868) The Court held the ordinances of secession “absolutely null” and found the seceding states never actually left the Union in any legal sense. The legal chain from 1789 to today is unbroken.
The Oldest Written National Constitution Still in Force
Measured against other countries, 237 years is exceptional. France has cycled through ten distinct constitutional orders since 1789, including five republics, two empires, a monarchy, and two dictatorships. El Salvador has had 36 constitutions since 1824. Most constitutions in force today were adopted after 1970. The U.S. Constitution is the oldest written national constitution still operating anywhere in the world.
So if someone asks how old the U.S. government is, the accurate answer depends on which government they mean. The nation is 250 in 2026. The government structure written in 1787 and switched on in 1789 is 237. The Constitution behind it has run longer without replacement than any other in the world.