Molokai or Molokai (; Hawaiian: ), often called the "Friendly Island", is an island in the Hawaiian archipelago. It is 38 by 10 miles (61 by 16 km) in size at its extreme length and width with a usable land area of , making it the fifth-largest of the main Hawaiian Islands and the 27th largest island in the United States. It lies east of Oahu across the 25-mile (40 km) wide Kaiwi Channel and north of Lanai, separated from it by the Kalohi Channel.