Avellino is a town and comune, capital of the province of Avellino in the Campania region of southern Italy.
Avellino may also refer to:
- Province of Avellino, a province in the Campania region of Italy
- Avellino (surname)
- Air Avellino, aka S.S. Felice Scandone, Italian basketball club
- Avellino eruption, eruption of Mount Vesuvius in the 2nd millennium BC
- U.S. Avellino 1912, Italian football club
- Roman Catholic Diocese of Avellino, Italian Catholic diocese in Naples