Ilha Comprida (Long Island) is a municipality in the state of São Paulo in Brazil. Stretching southwest along the Atlantic coast of the state, it is coextensive with the barrier island of Ilha Comprida, the longest of its kind in the state. The municipality was founded in 1992 after the merger of the tract of Ilha Comprida that belonged to the city of Cananéia with the section of the island that was administered by the city of Iguape. It has an average annual temperature of 24°C. The population in the 2011 census estimates was 9,203 and the area is 188.5 km².