| Melones Dam | |
|---|---|
&sq=&lang=&file=File:Cuba_physical_map.svg)  Location of Melones Dam in Cuba | |
| Official name | Presa Melones |
| Country | Cuba |
| Location | Mayarí, Holguín Province |
| Coordinates | 20°35′55.79″N 75°39′49.53″W / 20.5988306°N 75.6637583°W |
| Purpose | Water supply |
| Status | Operational |
| Construction began | Early 1980s |
| Opening date | 2011 |
| Dam and spillways | |
| Type of dam | Embankment, concrete-face rock-fill |
| Impounds | Mayarí River |
| Height | 86 m (282 ft) |
| Length | 507 m (1,663 ft) |
| Reservoir | |
| Total capacity | 630,000,000 m3 (510,000 acre⋅ft) |
| Normal elevation | 85 m (279 ft) |
The Melones Dam, also known as the Mayarí Dam, is a concrete-face rock-fill dam on the Mayarí River about 7 km (4.3 mi) south of Mayarí in Holguín Province, Cuba. It is the tallest dam in the country and the center-piece of the East–West Transvase System.