The U.S. Army is about 250 years old as of 2025–2026, because its official origin date is June 14, 1775.

Quick Scoop

  • The U.S. Army traces its birth to the Continental Army , which was created by the Second Continental Congress on June 14, 1775, to fight Great Britain in the American Revolutionary War.
  • The Army itself recognizes June 14, 1775, as its official birthday and “America’s first national institution.”
  • In June 2025, it marked its 250th anniversary (often referred to in coverage as the Army’s 250th “birthday”).

A tiny bit of story

You can think of the Army as being older than the United States itself: it was formed more than a year before the Declaration of Independence in 1776, when the colonies realized they needed a unified force to stand up to the British Army. From that first Continental Army around Boston in 1775 to today’s modern force, the institution has kept that founding date as the start of its age, so when people ask “how old is the US Army,” they’re counting from June 14, 1775.

In short: founded June 14, 1775 → about 250 years old today.

TL;DR: The U.S. Army was founded on June 14, 1775, which makes it roughly 250 years old now.

Information gathered from public forums or data available on the internet and portrayed here.