The War of 1812 was fought from June 18, 1812, to February 17, 1815, between the United States and Great Britain.

Quick Scoop: When Was the War of 1812?

  • The United States declared war on Great Britain on June 18, 1812.
  • The conflict effectively ended with the signing of the Treaty of Ghent on December 24, 1814, but the treaty was not fully ratified and in force until February 17, 1815.
  • So when people ask “when was the War of 1812?”, they usually mean the span from mid-1812 to early 1815.

In short, the War of 1812 ran a bit longer than its name suggests, continuing into 1815 before peace was formally recognized.

TL;DR: The War of 1812 lasted from June 18, 1812, until February 17, 1815.

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