Rimatara is the westernmost inhabited island in the Austral Islands of French Polynesia. It is located 550 km (340 mi) south of Tahiti and 150 km (93 mi) west of Rurutu. The land area of Rimatara is 8.6 km (3.3 sq mi), and that of the Maria islets is 1.3 km (0.50 sq mi). Its highest point is 106 m (348 ft). Its population was 893 at the 2022 census.
Rimatara is a circular volcanic plateau surrounded by a reef with a height of 8 to 10Â m (26 to 33Â ft). The main villages are Amaru (the capital), Anapoto and Mutuaura.