French naval officer, explorer, and colonizer.

Jean Ribaut began his naval career as a youth, rising through the ranks to become one of the most dependable officers serving under Admiral Gaspard de Coligny. In 1558 Ribaut was commander of a French supply vessel at the successful capture of Calais from the English, and the following year he went to Scotland to supervise French interests in that nation.

Ribaut was appointed commander of an expedition that was designed to found a French Huguenot colony in Florida in 1562. Early that spring he sailed from France with three ships carrying approximately 150 colonists, and on May 1 they landed near the mouth of the St. John's River (or, as he called it, Rivière de Mai) in Florida. Ribaut claimed the lands for France but sailed northward to the sound of Port Royal, which he named, and established Charlesfort (probably on southern Port Royal Island, now in South Carolina, U.S.). He returned to France on July 20, 1562. France's religious wars prevented him from bringing fresh supplies to Charlesfort, and the colonists there soon abandoned the settlement. A Protestant, Ribaut was forced to seek refuge in England, where he subsequently was imprisoned after refusing to assist a colonization project in the New World. While he was in England, his memoir, Whole and True Discovery of Terra Florida, was published.

Ribaut eventually was released from prison by Queen Elizabeth I. In 1565 Admiral Coligny dispatched him with seven ships to reinforce the recently founded Huguenot settlement of Fort Caroline on the St. John's River. The Spanish government of Philip II, with its own claims to Florida, ordered Pedro Menéndez de Avilés to destroy the French colony. Menéndez finally succeeded in capturing Fort Caroline after an overland expedition from his own settlement at St. Augustine and captured Ribaut when a storm scattered Ribaut's fleet and drove his flagship ashore. Menéndez, who earlier had massacred the French prisoners at Fort Caroline, ordered Ribaut and his surviving crew members executed as Protestant heretics.