East Rennell is the southern portion of Rennell Island in the Solomon Islands which is designated a UNESCO World Heritage Site. Rennell is the largest raised coral atoll in the world and the area in East Rennell surrounding Lake Tegano contains many endemic species.

In 2013, the World Heritage Committee added East Rennell to the List of World Heritage in Danger because of the threat of logging activities to the site's outstanding universal value.