| Waterdown Dam | |
| Name Official: | Waterdown Dam |
| Dam Crosses: | Klipplaat River |
| Res Name: | Waterdown Dam Reservoir |
| Location: | Near Whittlesea, Eastern Cape |
| Country: | South Africa |
| Owner: | Department of Water Affairs |
| Dam Type: | F |
| Opening: | 1958 |
| Res Catchment: | 602 km2 |
| Coordinates: | -32.285°N 26.8622°W |
Waterdown Dam is an earth-fill type dam (reservoir) located on the Klipplaat River near Whittlesea, Eastern Cape, South Africa. It supplies Whittlesea and Queenstown with drinking water and was established in 1958. The hazard potential of the dam has been ranked high (3).