Hawaii Superferry was a Hawaii-based transportation company that provided passenger and vehicle transportation between Honolulu Harbor on the island of Oʻahu and Kahului Harbor on Maui. Legal issues over environmental impact statements and protests from residents of Maui and Kauaʻi temporarily delayed the implementation of service, but service between Oʻahu and Maui began in December 2007. The company had hoped to return service to Nawiliwili Harbor on Kauaʻi and additionally planned to eventually provide service to Kawaihae Harbor on the Big Island.

The island of Maui is an island in the Hawaiian archipelago, its second-largest at 727.2 square miles (1,883 km2). It is the 17th-largest in the United States. Maui is one of Maui County's five islands, along with Molokaʻi, Lānaʻi, Kahoʻolawe, and Molokini.