Island council elections were held in the Netherlands Antilles on 12 April 1991 to elect the members of the island councils of its five island territories. The election was won by the Bonaire Patriotic Union (6 seats) in Bonaire, the National People's Party (10 seats) in Curaçao, the Windward Islands People's Movement (4 seats) in Saba, and the Sint Maarten Patriotic Alliance (4 seats) in Sint Maarten.