Princess Daisy is a fictional character in Nintendo's Mario franchise.
Princess Daisy may also refer to:
- Princess Daisy (novel), a 1980 novel by Judith Krantz
- Princess Daisy (miniseries), a 1983 TV miniseries based on Krantz's novel
- Daisy, Princess of Pless (1873–1943), British-born socialite and German princess
- Princess Margaret of Connaught (1882-1920), British-born princess, consort of Gustaf VI Adolf who was the crown prince of Sweden at that time. Her nickname was Daisy