| River system | Riparian countries | Area of basin in the country | |
| (km2) | (%) | ||
| Inkomati | South Africa | 29,200 | 62.47 |
| Mozambique | 14,600 | 31.20 | |
| Swaziland | 3000 | 6.33 | |
| Limpopo | South Africa | 183,500 | 44.25 |
| Mozambique | 87,200 | 21.02 | |
| Botswana | 81,500 | 19.65 | |
| Zimbabwe | 62,600 | 15.08 | |
| Maputo | South Africa | 18,500 | 60.31 |
| Swaziland | 10,600 | 34.71 | |
| Mozambique | 1500 | 4.98 | |
| Orange | South Africa | 563,900 | 59.65 |
| Namibia | 240,200 | 25.40 | |
| Botswana | 121,400 | 12.85 | |
| Lesotho | 19,900 | 2.10 | |