Sébastien Racle, Anglicized as Sebastian Rale (or Râle, Rasle, Rasles) (January 20, 1657 – August 23, 1724) was a Jesuit missionary and lexicographer who worked among the eastern Wabanaki people. He was stationed on the border of Acadia and New England and helped protect the border of Acadia by encouraging raids upon the British settlements in present-day Maine. He fought throughout King William's War and Queen Anne's War, eventually being killed by the British during Father Rale's War.
Born in Pontarlier, France, Sébastien Racle studied in Dijon. In 1675 he joined the Society of Jesus at Dole and taught Greek and rhetoric at Nîmes. He volunteered for the American missions and came to the New World in a party led by Governor-general Frontenac of New France in 1689. His first missionary work was at an Wabanaki village Saint Francois, near Quebec. (Upon the eventual defeat of Rale and the Wabanaki at Norridgewock, Maine, the Wabanaki retreated to St. Francois). He then spent two years ministering to the Illinois Indians at Kaskaskia. The former teacher of Greek would learn and speak the Wabanaki language, and in 1691 began compiling an Wabanaki-French dictionary.