Ralph Kemplen (8 October, 1912 – 4 April, 2004) was a British film editor with more than fifty film credits between 1933 and 1982. Kemplen had a long collaboration with director John Huston (1906-1987) on six films between 1951 and 1966. Kemplen also directed one feature film, The Spaniard's Curse (1958).
Kemplen won the BAFTA Award for Best Editing for The Day of the Jackal (1973) and was nominated three times for the Academy Award for Best film Editing (for Moulin Rouge (1952), Oliver! (1968), and Day of the Jackal).