| Aiello del Sabato | |
| Official Name: | Comune di Aiello del Sabato |
| Coordinates: | 40.8833°N 63°W |
| Region: | Campania |
| Province: | Avellino (AV) |
| Frazioni: | Sabina, San Raffaele, Tavernola San Felice |
| Mayor: | Sebastiano Gaeta |
| Area Total Km2: | 10.87 |
| Population Total: | 4018 |
| Population As Of: | 30 April 2017 |
| Population Demonym: | Aiellesi |
| Elevation M: | 425 |
| Saint: | St. Sebastian |
| Day: | January 20 |
| Postal Code: | 83020 |
| Area Code: | 0825 |
Aiello del Sabato is a town and comune in the province of Avellino, Campania, southern Italy. Its name derives from the Latin agellus (meaning "field") and from the Sabato river, a tributary of the Calore Irpino.
Archaeological excavations have proven a human presence in the area from as early as the Roman era, and perhaps from the Palaeolithic Age. Aiello was however documented for the first time in 1045 AD.