| Lakenvallei Dam | |
| Name Official: | Lakenvallei Dam |
| Dam Crosses: | Sanddrifskloof River |
| Res Name: | Lakenvallei Dam Reservoir |
| Location: | Western Cape, South Africa |
| Operator: | Department of Water Affairs and Forestry |
| Dam Length: | 268 m |
| Dam Height: | 56 m |
| Dam Type: | gravity & arch |
| Opening: | 1974 |
| Res Capacity Total: | 10 300 000 m3 |
| Res Surface: | 83 ha |
| Coordinates: | -33.3669°N 19.5669°W |
Lakenvallei Dam is a combined gravity & arch type dam located on Sanddrifskloof River, near Ceres, Western Cape, South Africa. It was established in 1974 it serves mainly for irrigation purposes. The hazard potential of the dam has been ranked high (3).