Malgas Island is a small, 8.3 hectares (21 acres), uninhabited island lying in the northern part of the entrance to Saldanha Bay, in the Western Cape province of South Africa.

It is circular in shape and flat, with the highest point about 9 metres (30 ft) above sea level.

[1] Malgas was subject to guano removal in 1845, an activity which also resulted in the presence of low retaining walls, paths and, on the eastern side, several buildings and a jetty.

[2] Other breeding seabirds include bank and Cape cormorants, kelp and Hartlaub's gulls, and African penguins.

The Cape gannets have been studied intensely, and their breeding success is watched over by Honorary Rangers.