The Ladybower Reservoir is one of three reservoirs in the Upper Derwent Valley in Derbyshire, England. The River Derwent initially flows through Howden Reservoir, then Derwent Reservoir, and finally through Ladybower Reservoir.

Water is treated at Bamford water treatment works by Severn Trent Water. Treated water flows down the Derwent Valley Aqueduct to supply clean water to towns and cities in the East Midlands of England.

The dams were used during World War II for practice by 617 Squadron prior to the Dambusters raid on German dams. Occasional flypasts of the Battle of Britain Memorial Flight are staged to comemmorate this.