Marotiri is a group of four uninhabited volcanic rocks protruding from the sea (and several submerged rocks), forming the southeastern end of the Austral Islands of French Polynesia.

Marotiri is very isolated,[3] located about 1,167 km (725 mi) west-south-westward of Pitcairn Island.

[4] The closest island is Rapa Iti, 75 km farther northwest, but separated from it by an ocean depth of more than 1,500 meters.

The rocks emerge from a submarine platform 100 meters deep and 5 km in diameter.

The total land area is 43,100 m2, which is broken down as follows by the individual rocks: The southern rock is the largest, with a height of 113 meters at its highest point.