- Ondine (mythology) or Undine, a water nymph from German mythology
- Undine (novella) (1811), a novella by Friedrich de la Motte Fouqué
- Undine (opera By Hoffmann) (1816), an opera by E.T.A. Hoffmann based on de la Motte Fouqué's story
- Ondine (ballet) (1843), a ballet by Jules Perrot and Cesare Pugni
- Undine (opera By Lortzing) (1845), an opera by Albert Lortzing also based on de la Motte Fouqué's tale
- ''Ondine'' (1909), a movement of the piano piece Gaspard De La Nuit by Maurice Ravel
- Undine (Flute Sonata) , a Romantic sonata for solo flute by Carl Reinecke , inspired by the legend of the water nymph by the same name.
- Undine (Schreiner) (1928), an autobiographical book by Olive Schreiner
- ''Ondine'' (1939), a play by Jean Giraudoux
- ''Undine Leaves'', a poem by Ingeborg Bachmann
- 92 Undina , an asteroid
- USS Undine , two ships in the United States Navy
- Ondine (actor) (1937–1989), an actor
- Undine, a character in various video games:
- --- one of the eight Elemental Spirits in the Secret of Mana/Seiken Densetsu video game series
- --- one of the four elemental spirits in the Arcana video game
- --- a water spirit that can be summoned in Namco's Tales role-playing game series
- --- one of the wing-spirits of Dizzy , a character in the Guilty Gear fighting game series
- Ondine's Curse , a medical condition
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