Frederick William Freemantle (27 June 1871 – 12 September 1943) was an English first-class cricketer. He was a left-handed batsman and a fast-medium bowler, although which arm he used to bowl is unknown. Freemantle made his first-class debut for Hampshire in 1900 against Kent. His final first-class match for Hampshire came in the same season against Leicestershire. Freemantle died in Houghton, Hampshire on 12 September 1943.