| Poortjieskloof Dam | |
| Name Official: | Poortjieskloof Dam |
| Dam Crosses: | Groot River |
| Res Name: | Poortjieskloof Dam Reservoir |
| Location: | Western Cape, South Africa |
| Operator: | Department of Water Affairs and Forestry |
| Dam Length: | 144 m |
| Dam Height: | 33.5 m |
| Dam Type: | double curvature arch |
| Opening: | 1955 (renovated in 1968) |
| Res Capacity Total: | 9 680 000 m3 |
| Res Catchment: | 94 km2 |
| Res Surface: | 305 ha |
| Coordinates: | -33.8581°N 20.3711°W |
Poortjieskloof Dam is a double curvature arch type dam in the Groot River in Western Cape, South Africa. It was created in 1955 and renovated in 1968.