| Alphen Dam | |
| Name Official: | Alphen Dam |
| Dam Crosses: | Bonte River |
| Res Name: | Alphen Dam Reservoir |
| Location: | near Stellenbosch, Western Cape |
| Country: | South Africa |
| Owner: | Department of Water Affairs |
| Dam Length: | 122m (400feet) |
| Dam Height: | 21m (69feet) |
| Coordinates: | -34.0117°N 18.8736°W |
Alphen Dam is a small dam in the Bonte River near Stellenbosch, Western Cape province of South Africa. It was established in 1990.