| Lake Arthur Dam | |
| Name Official: | Lake Arthur Dam |
| Dam Crosses: | Tarka River |
| Res Name: | Lake Arthur |
| Country: | South Africa |
| Owner: | Department of Water Affairs |
| Dam Length: | 500 m |
| Dam Height: | 38 m |
| Dam Type: | F |
| Opening: | 1924 |
| Res Capacity Total: | 10 700 000 m³ |
| Res Surface: | 886.7 ha |
| Coordinates: | -32.2169°N 25.8181°W |
Lake Arthur Dam[1] [2] is an earth-fill type dam located on the Tarka River, near Cradock, Eastern Cape, South Africa. It was established in 1924 and serves mainly for irrigation purposes. The hazard potential of the dam has been ranked high (3).