Wales is a country that is part of the United Kingdom and the island of Great Britain bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million and a total area of 20 779 km² (8 023 sq mi). Wales has over 1 200 km (746 mi) of coastline including its offshore islands; the largest Anglesey (Ynys Môn) is also the largest island in the Irish Sea.