| Location Map: | India Kerala#India |
| Website: | KSEB - Official website |
| Vellathooval Dam | |
| Country: | India |
| Location: | Idukki, Kerala |
| Dam Type: | G |
| Status: | O |
| Purpose: | P |
| Owner: | Kerala State Electricity Board |
| Spillway Type: | Ungated |
| Dam Crosses: | Muthirapuzha river |
| Plant Capacity: | 3.6 |
| Plant Name: | Vellathooval Power House |
| Plant Turbines: | 2 × 1.8 MW |
| Coordinates: | 9.9742°N 77.0278°W |
| Plant Coordinates: | 9.9739°N 77.0278°W |
| Plant Operator: | Kerala State Electricity Board |
Vellathooval Dam is a diversion dam built on the Muthirappuzha river in Vellathooval village in Devikulam taluk of Idukki district in Kerala, India. The height of the dam from the deepest foundation is and length is . Water from the Sengulam Power House and from the Muthirapuzha river gets released to the Vellathooval dam. Water from this dam is diverted through a canal system to the powerhouse near Panniyar [1] After the water flow is used to generate hydroelectricity, the water is released back into the river.[2] The dam is one of the major tourist attractions in the Idukki District, Kerala.[3] [4]