Vice Admiral Sir Benjamin Charles Stanley Martin KBE DSO (18 July 1891 – 3 June 1957) was a Royal Navy officer who was the first boy from the , Greenwich, to reach flag rank in the Royal Navy. He was also the first officer from the lower deck to become a rear admiral on the active list in modern times and only the second, after Sir Thomas Spence Lyne, to achieve flag rank at all in the same period.