Korčula is an island in the Adriatic Sea, in the Dubrovnik-Neretva County of Croatia.
The island of Korčula belongs to the central Dalmatian archipelago, separated from the Pelješac peninsula by a narrow Strait of Pelješac, between 900 and 3,000 metres (3,000 and 9,800 feet) wide.
It stretches in the east-west direction, in length of 47 kilometres (29 miles); on average, it is 8 km (5.0 miles) wide. With an area of 279 square kilometres (108 sq mi), it is the sixth largest Adriatic island.
The highest peaks are Klupca, 568 metres (1,864 ft) and Kom, 510 metres (1,670 ft) high.
Main settlements on the island are towns of Korčula, Vela Luka and Blato. Villages on the coast are Brna, Lumbarda, Račišće, Zavalatica, Prižba and Prigradica, while Žrnovo, Pupnat, Smokvica and Čara are placed inland.
The climate is Mediterranean; an average air temperature in January is 9.8 °C (49.6 °F) and in July 26.9 °C (80.4 °F).