William Paulet, 1st Marquess of Winchester (c. 1483–1572), was an English nobleman and politician during the Tudor period. He served as a key figure in the court of Queen Elizabeth I and held various important positions, including Lord High Treasurer. His influence and wealth were significant during a time of political and religious change in England. Paulet was born into a prominent family and inherited substantial estates, which contributed to his status. He was created Marquess of Winchester in 1551, making him one of the first to hold this title. His legacy includes his role in the administration of the English government and his contributions to the Tudor dynasty.