尼科巴群岛（Nicobar Islands），印度洋中一群岛，位于孟加拉湾和安达曼海之间，北为安达曼群岛，南为印度尼西亚苏门答腊岛，目前与安达曼群岛同属印度安达曼-尼科巴群岛联邦直辖区管辖。群岛由22个岛屿组成，面积1841平方公里，人口42026人。其中大尼科巴岛即为郑和下西洋时所到之翠兰屿。

The Nicobar Islands are an archipelagic island chain in the eastern Indian Ocean and one of the most isolated in the world. They are located in Southeast Asia, 150 km north of Aceh on Sumatra, and separated from Thailand to the east by the Andaman Sea. Located 1,300 km southeast of the Indian subcontinent, across the Bay of Bengal, they form part of the Union Territory of Andaman and Nicobar Islands, India.