Castelvetrano (Sicilian: Castiḍḍuvitranu) is a town and comune in the province of Trapani, Sicily, southern Italy. The archeological site of Selinunte is located within the municipal territory.
The municipality borders with Campobello di Mazara, Mazara del Vallo, Menfi, Montevago, Partanna, Salemi and Santa Ninfa.
Selinunte (/ˌsɛlɪˈnuːnteɪ/ SEL-in-OON-tay, Italian: [seliˈnunte]; Ancient Greek: Σελῑνοῦς, romanized: Selīnoûs [seliːnûːs]; Latin: Selīnūs [sɛˈliːnuːs]; Sicilian: Silinunti [sɪlɪˈnuntɪ]) was a rich and extensive ancient Greek city of Magna Graecia on the south-western coast of Sicily in Italy. It was situated between the valleys of the Cottone and Modione rivers. It now lies in the comune of Castelvetrano, between the frazioni of Triscina di Selinunte in the west and Marinella di Selinunte in the east.
The archaeological site contains many great temples, the earliest dating from 550 BC, with five centred on an acropolis.
Marinella di Selinunte, also known as Marinella, is a southern Italian village and hamlet (frazione) of Castelvetrano, a municipality in the Province of Trapani, Sicily. It is located close to the Ancient Greek city of Selinunte and, in 2011, it had a population of 1,499.