Eagle Island is about from Eagle Bluff on the Peron Peninsula in Shark Bay World Heritage Site in the Gascoyne region of Western Australia.
It is a sand island with an area of about, and an elevation of .
The island's vegetation is a closed heath, of which the dominant plant species is Nitraria billardierei (nitre bush). Other plant species include Limonium salicorniaceum; Sporobulus virginicus; species of Calandrinia, Pelargonium, Poa and Selenothamnus; and an introduced species of Chenopodium. Silver gulls nest on the island, and a small number of pied cormorants roost there.