| Greater Brandvlei Dam | |
| Name Official: | Greater Brandvlei Dam |
| Dam Crosses: | Breede River |
| Res Name: | Greater Brandvlei Dam Reservoir |
| Location: | Western Cape, South Africa |
| Operator: | Department of Water Affairs and Forestry |
| Dam Length: | 1250 m |
| Dam Height: | 21.5 m |
| Dam Type: | earth-fill |
| Opening: | 1983 |
| Res Capacity Total: | 459 000 000 m³ |
| Res Catchment: | 64 km2 |
| Res Surface: | 4110 ha |
| Coordinates: | -33.7003°N 19.4628°W |
Greater Brandvlei Dam is an earth-fill type dam located on a tributary of the Breede River, near Worcester, Western Cape, South Africa. It was formed by joining the original Brandvlei Dam (Lake Marais) and the Kwaggaskloof Dam after reconstruction in 1989. Its main purpose is for irrigation use and the hazard potential of the dam has been ranked high (3).