D414 is the main state road on Pelješac peninsula in Croatia connecting towns of Ston and Orebić and ferry ports in Orebić, Trpanj and Prapratno, from where Jadrolinija ferries fly to islands of Korčula and Mljet as well as the mainland port of Ploče, connecting to the D118, D413 and D123 state roads respectively. The road is 64.7 km (40.2 mi) long.

Pelješac 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.