Walkerwood Reservoir is a reservoir in the Brushes Valley above Stalybridge in Greater Manchester. It was built in the 19th century by the corporations of Ashton-under-Lyne and Stalybridge to provide a supply of safe drinking water, one of four reservoirs authorised by the Ashton-under-Lyne and Stalybridge (Corporations) Waterworks Act 1864. It is owned and operated by United Utilities.