Efate is an island in the Pacific Ocean which is part of the Shefa Province in The Republic of Vanuatu. It is also known as Île Vate. It is the most populous (approx. 50,000) island in Vanuatu. Efate's land area of 899.5 square kilometres (347.3 sq mi) makes it Vanuatu's third largest island. Most inhabitants of Efate live in Port Vila, the national capital. Its highest mountain is Mount McDonald with a height of 647 metres (2,123 ft).
During World War II, Efate served an important role as a United States military base.