Régua Dam (Portuguese: Barragem da Régua) is a concrete gravity dam on the Douro, where the river forms the border line between the districts of Vila Real and Viseu.

It is located in the municipality Peso da Régua, in Vila Real District, Portugal.

The spillway with 5 radial gates is part of the dam body (maximum discharge 21,500 m³/s).

The run-of-the-river hydroelectric power plant was commissioned in 1973.

[2] The turbines were provided by Kværner, the generators by Brown, Boveri & Cie.[5] On the left side of the dam is a lock, which can handle ships with the following maximum properties: 83 m in length, 11.40 m on the beam, 3.8 m load-draught and a cargo capacity of 2500 tons.