Holcroft Blood (c. 1660 – 19 August 1707) was an Anglo-Irish soldier, notable for his service as an engineer and artillery commander under the Duke of Marlborough during the War of the Spanish Succession. He was the son of Thomas Blood, an adventurer who became notorious for his failed attempts to steal the crown jewels from the Tower of London and assassinate the Duke of Ormonde. His mother was Mary Holcroft, daughter of the Liverpool Mayor and MP John Holcroft.