博杜安（1930年9月7日－1993年7月31日）是比利时国王。他是比利时国王利奥波德三世与第一任妻子瑞典公主阿斯特里德公主(Princess Astrid of Sweden)所生的长子。Baudouin是他的法语名字，也是他最为人所熟悉的名字；他的荷兰语名字是Boudewijn。

Baudouin or Boudewijn (7 September 1930 – 31 July 1993) reigned as King of the Belgians, following his father's abdication, from 1951 until his death in 1993. He was the eldest son of King Leopold III (1901–83) and his first wife, Princess Astrid of Sweden (1905–35).