Errwood Reservoir is a drinking-water reservoir in the Peak District National Park, within the county of Derbyshire and very close to the boundary with Cheshire.

It was constructed by the Stockport Water Corporation at a cost of £1.5 million, with work being completed in 1967; it is currently owned and operated by United Utilities.

Errwood Sailing Club uses the reservoir for sailing training/racing,[1] and fishing rights are controlled by Errwood Fly Fishing Club.

[2] The Peak District Boundary Walk runs across Errwood dam and passes above the eastern side of the reservoir.

[3] Media related to Errwood Reservoir at Wikimedia Commons