Blue Jacket, or Weyapiersenwah (c. 1743 – 1810), was a war chief of the Shawnee people, known for his militant defense of Shawnee lands in the Ohio Country. Perhaps the preeminent American Indian leader in the Northwest Indian War, in which a pantribal confederacy fought several battles with the nascent United States, he was an important predecessor of the famous Shawnee leader Tecumseh.