Maiʻao, also rendered Maiao in languages other than Tahitian, is an 8.8 km2 (3.4 sq mi) island formation located 78 km (48 mi) southwest of Moʻorea and one of the Windward Islands (French: Îles du Vent) in French Polynesia.

The formation encloses two hypersaline lagoons called Roto Iti and Roto Rahi.

All lagoons are connected through narrow channels.

The island is home to 343 people (2022 census).

The island is administratively part of the commune (municipality) of Moʻorea-Maiʻao, itself in the administrative subdivision of the Windward Islands.