Banksia occidentalis, commonly known as the red swamp banksia,[3] is a species of shrub or small tree that is endemic to the south coast of Western Australia.

[3][4][5][6] Banksia occidentalis was first formally described in 1810 by Robert Brown in Transactions of the Linnean Society of London.

Red swamp banksia occurs along the south coast of Western Australia between Augusta and Cape Arid National Park where it grows in shrubland or woodland, usually on the edges of swamps but sometimes also on coastal dunes.

[10] This banksia is listed as "not threatened" by the Western Australian Government Department of Parks and Wildlife.

[11] The species was observed to be in cultivation in England in the gardens of Chiswick House in 1834.