Korčula is a Croatian island in the Adriatic Sea. It has an area of 279 km2 (108 sq mi); 46.8 km (29.1 mi) long and on average 7.8 km (4.8 mi) wide — and lies just off the Dalmatian coast. Its 15,522 inhabitants (2011) make it the second most populous Adriatic island after Krk and the most populous Croatian island not connected to the mainland by a bridge. The population are almost entirely ethnic Croats (95.74%). The island is twinned with Rothesay in Scotland.