Nais (disambiguation)

Naïs is an eighteenth-century opera by Jean-Philippe Rameau.

Nais may also refer to:
 * Naïs (film), a 1945 French film
 * Nais (Lydia), a town of ancient Lydia
 * Naïs (mythology), several women in Greek mythology

Biology

 * Nais (fungus), a genus of fungi in the family Halosphaeriaceae
 * Nais (annelid), a genus of oligochaete worms in the family Naididae
 * Nais, an invalid genus of butterflies in the family Lycaenidae; nowadays part of Chrysoritis