| Baronissi | |
| Official Name: | Comune di Baronissi |
| Coordinates: | 40.7462°N 14.7705°W |
| Province: | (SA) |
| Frazioni: | Acquamela, Aiello, Antessano, Capo Saragnano, Caprecano, Casal Barone, Casal Siniscalco, Fusara, Orignano, Saragnano, Sava |
| Mayor: | Gianfranco Valiante |
| Area Total Km2: | 17.93 |
| Population Footnotes: | [1] |
| Population Total: | 17061 |
| Population As Of: | 28 February 2017 |
| Population Demonym: | Baroniensi or Baronissesi |
| Elevation M: | 260 |
| Saint: | St. Francis of Assisi |
| Day: | 4 October |
| Postal Code: | 84081 |
| Area Code: | 089 |
Baronissi is a town and comune in the province of Salerno in the Campania region of south-western Italy. It is home to a campus of the University of Salerno.
The town develops from the original old area named Casali.
The town is situated 7 km north of Salerno and it is 35 km from Avellino. The bordering municipalities are Castiglione del Genovesi, Cava de' Tirreni, Fisciano, Mercato San Severino, Pellezzano and Salerno.
Its 11 hamlets (frazioni) are Acquamela, Aiello, Antessano, Capo Saragnano, Caprecano, Casal Barone, Casal Siniscalco, Fusara, Orignano, Saragnano, Sava (the most populated one).
The municipality has two train stations (Baronissi, in town's center, and Acquamela, in the homonym village), both on the line Salermo-Mercato San Severino. It is also served by the motorway RA 2 Salerno-Avellino, at the exits "Baronissi Sud" and "Lancusi-Baronissi Nord".