Lachlan Island is an island off the Kimberley coast of Western Australia.

Situated at the northern end of King Sound approximately  east of Bardi, the island is part of the Buccaneer Archipelago.

The island occupies an area of .

A survey in 2009 found populations of the endangered golden bandicoots and golden-backed tree-rats were present on the island.

References

Buccaneer Archipelago