Ayu

Ayu or AYU may refer to:
 * Ayu (given name)
 * Ayu sweetfish (Plecoglossus altivelis), a species of smelt
 * Ayu, a local name for the African manatee
 * Ayu (singer) or Ayumi Hamasaki, Japanese singer
 * Ayu Islands, a small archipelago in Indonesia
 * Ayu, Dawei, a village in Burma
 * Ayu language, a language of Nigeria
 * Aiyura Airport, IATA code AYU