The list of marine molluscs of South Africa is a list of saltwater species that form a part of the molluscan fauna of South Africa. This list does not include the land or freshwater molluscs.

Gastropoda

See List of marine gastropods of South Africa

Bivalvia

Bivalves in South Africa include: Nuculidae Mytilidae – Mussels Arcidae – Ark clams Noetiidae Pinnidae – Pen shells Gryphaeidae Ostreidae – True oysters Anomiidae – Saddle oysters Gryphaeidae – Honeycomb oysters Pteriidae – Pearl oysters Pectinidae – Scallops Limidae – File shells Cardiidae – Cockles Tridacnidae – Giant clams Mactridae – Trough shells Carditidae Condylocardiidae Solenidae Lucinidae Unionidae Lasaeidae Tellinidae Teredinidae Donacidae – Wedge shells Psammobiidae – Sunset clams Veneridae – Venus shells

Polyplacophora

Chitons (Polyplacophora) in South Africa include: Ischnochitonidae Chitonidae Callochitonidae Acanthochitona Chaetopleuridae

Cephalopoda

Cephalopods in South Africa include: Octopodidae Argonautidae Loliginidae Sepiidae Spirulidae

Scaphopoda

Tusk shells (Scaphopoda) in South Africa include: Dentaliidae Gadilidae