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How Old Is The USA?
The United States of America is 249 years old as of July 4, 2025. This age is calculated from the signing of the Declaration of Independence on July 4, 1776, when the thirteen original British colonies declared themselves a new, independent nation.
Although the Treaty of Paris in 1783 or January 14, 1784, officially ended the Revolutionary War and confirmed U.S. sovereignty, July 4, 1776, is widely celebrated as the nation's birthdate. The country's name, "United States of America," was officially adopted shortly after, on September 9, 1776.
While some argue the nation's origins could trace back to earlier colonial assemblies or other events, historically, the United States' age is counted from its declaration of independence from Britain in 1776.
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