Maupihaa, also known as Mopelia, is an atoll in the Leeward group of the Society Islands. This atoll is located 72 km southeast of Manuae, its nearest neighbor.
Maupihaa atoll is roughly 8 km in length and contains a lagoon that is up to 40 m in depth and is surrounded by submerged reefs on three sides. The atoll's outer reefs are continuous except for a small passage on the western side of the atoll. The eastern side consists of a narrow, thickly vegetated, and a number of islets. The only village on the atoll is located on Motu Maupihaa and as of 1985, the population consisted of just 10 people.