Baronissi is a town and comune in the province of Salerno in the Campania region of south-western Italy.

The bordering municipalities are Castiglione del Genovesi, Cava de' Tirreni, Fisciano, Mercato San Severino, Pellezzano and Salerno.

[3] 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".