The shape of Raraka Atoll is an oval 27 km long and 19 km wide. Its fringing reef has many sandbanks and small motu (islets). This atoll has a wide lagoon with a navigable pass to the ocean.
Raraka has 96 inhabitants (2017).[2] There is only one village on Motutapu in the northwest.
The first recorded European to sight Raraka Atoll was Captain Ireland in 1831.[3]
Raraka Atoll was visited by the historic United States Exploring Expedition on 30 Aug. 1839.[4]Charles Wilkes reported: "The next day they reached Raraka Atoll and were allowed ashore to explore it on that and the following day. There they met about 40 peaceful islanders, who had native-born missionary among them. Their chief was missing his left hand, it having been bitten off by a shark."