Chhera Island, also called Chhera Dwip, Cheradia Island or Cheridia Island, is an uninhabited island and extension of St. Martin's Island at the mouth of the Naf River in the Bay of Bengal, within the Chittagong Division of southeastern Bangladesh. 
During high tides it is divided from St. Martin's Island by the sea. During low tides, the island can be reached by walking for about 2½ hours from St. Martin's Island.
The most popular travel mode to it is by local motorboat or tourist boat services.
- Sifatul Quader Chowdhury (2006). "St Martin's Island (with map showing Cheradia Island)". In Sirajul Islam. Banglapedia: National Encyclopedia of Bangladesh. Asiatic Society of Bangladesh.
- "Visit Chhera Island of Bangladesh and watch broken and unbroken corals and enjoy".
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