Garden Island is a tied island 2 kilometres (1.2 mi) from Clarence Point, near the mouth of the Tamar River in Tasmania.
Garden Island is surrounded on all sides by the Tamar River, an estuary which has been excavated to provide a channel for shipping.
The backfill from this dredging was moved towards the shore, and provided easier access by connecting the island.
There are no facilities of any type on the island, but it provides productive seawater fishing spots, and a flat and open scenic lookout.
[2] The island was known as Green Island in the early nineteenth century and was used for food storage by the settlement established by Colonel William Paterson in 1804.