Tasman Island is a small island in south-eastern Australia. It is part of Tasmania. It has an area of , and consists of a plateau surrounded by steep cliffs. The plateau is about above sea level, the highest point on the island is about above sea level. In 1905, a lighthouse was built on the island; there is also a weather station. Since 1977, the lighthouse is automatic, and no longer requires people to be on the island. The island is named after Abel Tasman. It is part of Tasman National Park today.