Grimsby Dock Tower is a hydraulic accumulator tower and a maritime landmark at the entrance to the Royal Dock, Grimsby, in North East Lincolnshire, England. It was completed on 27 March 1852, based on William Armstrong's idea of the hydraulic accumulator, with the purpose of containing a 30,000-imperial-gallon (140,000 L) reservoir at a height of 200 feet (61 m), that was used to provide hydraulic power to power the machinery of the Grimsby Docks. The extreme height of the tower was necessary to achieve sufficient pressure, and as a result of this, the tower can be seen for several miles around, even far inland on the north bank of the Humber estuary in villages such as Patrington.

James William Wild was a British architect. Initially working in the Gothic style, he later employed round-arched forms. He spent several years in Egypt. He acted as decorative architect to the Great Exhibition of 1851, and designed the Grimsby Dock Tower, completed in 1852. After a considerable break in his career he worked on designs for the South Kensington Museum, and designed the British embassy in Tehran. He was curator of the Sir John Soane's Museum from 1878 until his death in 1892.