Pelješac (Croatian pronunciation: [pɛ̌ʎɛʃats]; Chakavian: Pelišac; Italian: Sabbioncello) is a peninsula in southern Dalmatia in Croatia. The peninsula is part of the Dubrovnik-Neretva County and is the second largest peninsula in Croatia. From the isthmus that begins at Ston, to the top of Cape Lovišta, it is 65 km or 40 mi long.
The name Pelješac is most likely derived from the name of a hill above town of Orebić, which is Pelisac. This is a relatively new name for the peninsula. Throughout history other names have been used, such as Stonski Rat, Puncta Stagni, Ponta di Stagno. and Sabbioncello.