Castellammare di Stabia is a comune in the province of Naples, Campania region, in Italy. It is situated on the Bay of Naples about 30 kilometers southeast of Naples, on the route to Sorrento. The total population of Castellammare di Stabia is about 65.000.
The frazioni of Castellammare di Stabia are: Fratte, Madonna della Libera, Pioppaino, Ponte Persica, Pozzano, Privati, Quisisana, canzano, Varano.
Castellammare di Stabia lies next to the ancient Roman city of Stabiae, which was destroyed by the Vesuvius eruption in AD 79. The castle the city takes its name from was erected in around the 9th century on a hill commanding the southern side of the Gulf of Naples. It was restored during the reign of Frederick II of Hohenstaufen and enlarged by King Charles I of Anjou.
The excavation of Roman villas that have been preserved by the Eruption of Vesuvias in AD 79 are currently underway.