Alderaan may refer to:
Alderaan, a fictional planet in the Star Wars universe Alderaan (astronomy), a former name for a group of stars in the constellation of Gemini
Alderaan may also refer to:
Alderan, a character in the Hungarian epic poem The Siege of Sziget the fictional Aldaran family in the Darkover series of books
See also Aldebaran (disambiguation), a star in the constellation of Taurus Alderano, a given name