巴淡岛（印尼语：Batam）辖属印尼廖内群岛省，是廖内群岛的其中一个岛，面积 715 平方公里。为一个集商业、工业及旅游发展的岛屿。

巴淡岛相对地接近新加坡，与新加坡仅有20公里的距离。

Batam refers to both an island, municipality (an Indonesian kotamadya), the largest city in the Riau Islands Province of Indonesia, across the Strait of Singapore, the third-largest city in Sumatra region after Medan and Palembang, and the eighth-largest city in Indonesia after Jakarta Raya, Surabaya, Bandung, Medan, Semarang, Makassar, and Palembang.