Atun may refer to:
- People
- Hakkı Atun, former prime minister of the Turkish Republic of Northern Cyprus
- Norman Atun, Malaysian actor
- Fish
- Thyrsites atun (also snoek or Cape snoek), a perch-like commercial food fish in the Gempylidae family
- Atún, Spanish for tuna (e.g. Comisión Interamericana del Atún Tropical)
- Other
- Atum (also Atem or Tem), deity in Egyptian mythology
- Kabushiki-Gaisha Ātūn; see Artoon