Bluejacket, or Blue Jacket may refer to:

Blue Jacket or Weyapiersenwah (c. 1743 – c. 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 pan-tribal confederacy fought several battles with the nascent United States, he was an important predecessor of the famous Shawnee leader Tecumseh.

Little is known of Blue Jacket's early life. He first appears in written historical records in 1773, when he was already a grown man and a war chief. In that year, a British missionary visited the Shawnee villages on the Scioto River and recorded the location of Blue Jacket's Town on Deer Creek (present Ross County, Ohio).

Later a story spread that he was in fact a European settler named Marmaduke Van Swearingen, who had been captured and adopted by Shawnees in the 1770s, around the time of the American Revolutionary War. This story, popularized in historical novels written by Allan W. Eckert in the late 1960s, remains well known in Ohio, where an outdoor drama celebrating the life of the white Indian chief was performed yearly in Xenia, Ohio from 1981 until 2007.