Rennell Island, the world's largest raised coral atoll, belongs to which country?

Rennell Island belongs to the Solomon Islands. It is the main island of Rennell and Bellona Province, an administrative division of the Solomon Islands in the southwestern Pacific.

Rennell is a raised coral island about 80 kilometres long and 14 kilometres wide, with an area of roughly 660 square kilometres. Unlike a typical low coral atoll, tectonic uplift raised its reef platform well above sea level, leaving steep coastal cliffs and a broad interior plateau.

The island is famous for Lake Tegano, the largest lake in the insular Pacific and a UNESCO World Heritage Site. Rennell and nearby Bellona are also Polynesian outliers within the otherwise predominantly Melanesian Solomon Islands.

A common mix-up is confusing Rennell with the world's largest coral atoll claims. Kiritimati is often described as the largest atoll containing a lagoon, while Rennell is variously described as a raised or upraised coral atoll; terminology differs because Rennell lacks the classic lagoon structure.