- Futuna (/fuːˈtuːnə/; French: [fu.tu.na]) is the largest island in Hoorn Islands or Îles Horne, located in the Pacific Ocean, part of the French overseas collectivity (collectivité d’outre-mer) of Wallis and Futuna. The island occupies an area of 80 km2 (30 sq mi) and as of 2018 it has a population of 10,912.