| Name | Province and location | Area in Ha | Coordinates | Description |
|---|
| Bird Island Group (3) | Eastern Cape nearPort Elizabeth | | | now part of theAddo Elephant National Park |
| 1.Bird Island | Eastern Cape nearPort Elizabeth | 19 hectares (47 acres) | 33°50′S26°17′E / 33.833°S 26.283°E /-33.833; 26.283 | now part of theAddo Elephant National Park |
| 2.Stag Island | Eastern Cape nearPort Elizabeth | 0.1 hectares (0.25 acres) | 33°49′S26°16′E / 33.817°S 26.267°E /-33.817; 26.267 | now part of theAddo Elephant National Park |
| 3.Seal Island | Eastern Cape nearPort Elizabeth | 0.6 hectares (1.5 acres) | 33°50′S26°16′E / 33.833°S 26.267°E /-33.833; 26.267 | now part of theAddo Elephant National Park |
| Bird Island, Lamberts Bay | Western Cape atLamberts Bay | 8 hectares (20 acres) | 32°5′21″S18°18′4″E / 32.08917°S 18.30111°E /-32.08917; 18.30111 | Breakwater walkway to main land |
| Dassen Island | Western Cape South ofSaldanha Bay west ofYzerfontein | 273 hectares (670 acres) | 33°25′S18°5′E / 33.417°S 18.083°E /-33.417; 18.083 | |
| Duiker Island | Western Cape nearHout Bay | 0.4 hectares (0.99 acres) | 34°3′S18°19′E / 34.050°S 18.317°E /-34.050; 18.317 | |
| Dyer Island | Western Cape nearGans Bay | 30 hectares (74 acres) | 34°40′S19°25′E / 34.667°S 19.417°E /-34.667; 19.417 | |
| Hartbeespoort Dam Islands | North West | 1 hectare (2.5 acres) | 25°45′S27°53′E / 25.750°S 27.883°E /-25.750; 27.883 | |
| Kamfers Dam Artificial Island | Northern Cape North ofKimberley | 0.3 hectares (0.74 acres) | 28°40′S24°45′E / 28.667°S 24.750°E /-28.667; 24.750 | located in theKamfers Dam. |
| Kosi Bay Islands | KwaZulu-Natal inKosi Bay | 18 hectares (44 acres) | 26°54′S32°51′E / 26.900°S 32.850°E /-26.900; 32.850 | |
| Leisure Island | Western Cape,Knysna | 49 hectares (120 acres) | 34°3′S23°3′E / 34.050°S 23.050°E /-34.050; 23.050 | |
| Thesens Island | Western Cape,Knysna | 70 hectares (170 acres) | 34°2′S23°3′E / 34.033°S 23.050°E /-34.033; 23.050 | |
| Marion Island | Western Cape More than 1750 km southeast ofPort Elizabeth | 29,000 hectares (72,000 acres) | 46°52′S37°43′E / 46.867°S 37.717°E /-46.867; 37.717 | |
| Msikaba Island | Eastern Cape north ofPort Grosvenor | | 31°19′S29°58′E / 31.317°S 29.967°E /-31.317; 29.967 | |
| Prince Edward Island | Western Cape More than 1750 km southeast ofPort Elizabeth | 4,500 hectares (11,000 acres) | 46°37′S37°55′E / 46.617°S 37.917°E /-46.617; 37.917 | |
| Robben Island | Western Cape nearCape Town inTable Bay | 507 hectares (1,250 acres) | 33°48′S18°22′E / 33.800°S 18.367°E /-33.800; 18.367 | The island where Nelson Mandela and others were imprisoned |
| Saint Croix Island Group (3) | Eastern Cape nearPort Elizabeth | | | now part of theAddo Elephant National Park |
| 1.Saint Croix Island | Eastern Cape nearPort Elizabeth | 12 hectares (30 acres) | 33°47′S25°46′E / 33.783°S 25.767°E /-33.783; 25.767 | now part of theAddo Elephant National Park |
| 2.Brenton Island | Eastern Cape nearPort Elizabeth | 5 hectares (12 acres) | 33°49′S25°45′E / 33.817°S 25.750°E /-33.817; 25.750 | now part of theAddo Elephant National Park |
| 3.Jahleel Island | Eastern Cape nearPort Elizabeth | 5 hectares (12 acres) | 33°48′S25°42′E / 33.800°S 25.700°E /-33.800; 25.700 | now part of theAddo Elephant National Park |
| Saint Lucia Lake Island | KwaZulu-Natal nearSt Lucia onLake St. Lucia | 197 hectares (490 acres) | 27°57′S32°29′E / 27.950°S 32.483°E /-27.950; 32.483 | |
| Schaapeneiland | Saldanha Bay nearLangebaan | | 33°05′29″S18°01′14″E / 33.09139°S 18.02056°E /-33.09139; 18.02056 | |
| Seal Island | nearSimon's Town inFalse Bay | 4 hectares (9.9 acres) | 34°8′S18°34′E / 34.133°S 18.567°E /-34.133; 18.567 | Occupied byCape fur seals. |
| Seal Island (Mossel Bay) | nearMossel Bay | | 34°9′S22°7′E / 34.150°S 22.117°E /-34.150; 22.117 | |
| Vaal Dam Island | Just inside theGauteng border | 110 hectares (270 acres) | 26°52′S28°10′E / 26.867°S 28.167°E /-26.867; 28.167 | |
| Vaaldegrace Island Group - Vaal River (3) | Free State atParys | 110 hectares (270 acres) | | |
| 1.Vaaldegrace Island 1 | Free State atParys | | 26°55′S27°25′E / 26.917°S 27.417°E /-26.917; 27.417 | |
| 2.Vaaldegrace Island 2 | Free State atParys | | 26°53′S27°28′E / 26.883°S 27.467°E /-26.883; 27.467 | |
| 3.Vaaldegrace Island 3 | Free State atParys | | 26°53′S27°26′E / 26.883°S 27.433°E /-26.883; 27.433 | |
| Vondeling Island | Western Cape nearSaldanha Bay | 10 hectares (25 acres) | 33°9′S17°59′E / 33.150°S 17.983°E /-33.150; 17.983 | |
