Kuljak Island, Artificial island in Swan River, Western Australia

Kuljak Island is an artificial island in the Swan River, entirely within the suburb of Ascot in the City of Belmont. It lies between Ron Courtney Island upstream and Heirisson Island downstream, east of the Maylands Peninsula and south of Garratt Road Bridge. The island is ringed by several smaller artificial islets, and a walking trail mapped by the City of Belmont uses paved footpaths on and leading to it.

The area functioned as a city waste disposal site until the early 1980s, then was transformed into an artificial island in 1997. This conversion involved connecting two channels to create wetland habitat and converting a former landfill into a public recreation area.

The name Kuljak comes from the Noongar word for the black swan, and the island is also called Black Swan Island. From its western shore, the view of Tranby House, a house and garden on the opposite bank, is described as an important backdrop: the island keeps the river looking as it did when the house was built.

The island is accessible by car via Tidewater Way or by pedestrian bridge from Samphire Street. Paved pathways make it easy to walk around and reach different parts of the grounds.

Kuljak Island sits on the site of a former council rubbish tip that operated for 25 years before closing in the early 1980s. The 1997 dredging of two channels cut the landfill off from the surrounding artificial wetland, turning the old tip into an island.