Tengah Island is a privately owned island. It lies nine nautical miles off the coast of Mersing on the South China Sea off the east coast of Johor, Malaysia. It is 30 minutes away by boat from Mersing.
Near Besar Island, Tengah Island is 16 km off the coast and is an easy 45-minute boat ride. During the 1970s, the island became famous as a Vietnamese refugee transit camp which was subsequently closed in the early 1980s.