Grimsby Dock Tower is a hydraulic accumulator tower and a maritime landmark in Grimsby, North East Lincolnshire, England. It was completed on 27 March 1852 with the purpose of containing a 30,000 imperial gallons (140,000 l; 36,000 US gal) reservoir at a height of 200 feet (61 m), that was used to provide hydraulic power to power the machinery of the Grimsby Docks.