William Scamp (5 June 1801 – 13 January 1872) was an English architect and engineer.
After working on the reconstruction of Windsor Castle to designs of Sir Jeffry Wyatville, he was employed by the Admiralty from 1838 to his retirement in 1867.
Throughout his career of almost three decades, Scamp designed naval facilities in Britain, Malta, Gibraltar and Bermuda.
Scamp's early works from the 1840s include a dockyard and the Royal Naval Bakery in Malta.
During his stay in Malta, he oversaw the construction of St Paul's Pro-Cathedral, making significant alterations to the building in the process.
His most notable works in Britain were extensions of the Chatham and Portsmouth Dockyards carried out from the 1860s to the 1880s.