Keith Foulger (14 May 1925 – 24 May 2021) was a British naval architect. As a child he aspired to a career as a Royal Navy officer but failed the eyesight requirements and so started a career in naval architecture. Foulger joined the Royal Corps of Naval Constructors and worked on designs for the Porpoise and Explorer-class submarines. Following the 1958 US–UK Mutual Defence Agreement Foulger was chosen to lead a team to observe the construction of the Skipjack-class submarine being constructed for the US Navy. The first British nuclear submarine HMS Dreadnought would use the same reactor and so the aft portion had to accommodate that design. Foulger's job was to minimise any mismatch between this portion and the forward section which was to be a wholly British design.