Cranmer is an English surname.
Notable people with the surname include:
Thomas Cranmer (1489–1556), leader of the English Reformation and Archbishop of Canterbury during the reigns of Henry VIII and Edward VI
Peter Cranmer (1914–1994), English cricketer
Craig Cranmer (born 1968), Scottish footballer
Kyle Cranmer (born 1977), American particle physicist
Scotty Cranmer (born 1987), American BMX rider
Michael Cranmer (born 1989), South Australian cricketer
Paul Cranmer (born 1969), Canadian football player
Bob Cranmer (born 1956), former American politician from Pittsburgh, Pennsylvania.
Other notable people:
Francis Cranmer Penrose (1817–1903), British architect, archaeologist, and astronomer
Martha Cranmer Oliver (1834–1880), English actress