Clipperton Rock, Volcanic summit on Clipperton Island, France.

Clipperton Rock is a volcanic rock formation on Clipperton Island, a remote French territory in the central Pacific Ocean, rising about 29 meters above the water. The rock features multiple cavities and internal passages shaped by erosion over a very long period of time.

Clipperton Rock is the last fragment of the neck of the volcano that formed the island before it became an atoll; it is composed of trachyandesite. It marked one edge of a reef pass that existed until the 19th century, the other edge being the Crochet peninsula, which still faces it. The island is called a "near-atoll" rather than a true atoll because this residual rock mass survives on the surface.

A geodetic marker placed by the French National Institute of Geographic Information sits on the rock surface, used as a reference point for precise location measurements in this part of the Pacific. This makes the rock one of the few fixed reference points in a very remote stretch of ocean.

The island is rarely visited and reaching it requires official permission from French authorities. Once there, the terrain is rough and there are no facilities of any kind, so preparation for difficult outdoor conditions is essential.

The rock marks one edge of a reef pass that existed until the 19th century; the other edge is the Crochet peninsula, still facing it across the water. Immediately north lies the southern end of the Eastern Trench, the deepest point of the lagoon.