Derek John Semmence (20 April 1938 – 29 March 2020) was an English cricketer. Semmence was a right-handed batsman who bowled right-arm medium pace. He was born in Worthing, Sussex. Semmence made his first-class cricket debut for Sussex County Cricket Club against Warwickshire in the 1956 County Championship. He played first-class cricket for Sussex until 1959. Semmence served in the Royal Air Force in his early years with Sussex, which in 1957 entitled him to play first-class cricket for the Combined Services, firstly against Surrey. He played two further matches for the Combined Services, one in 1957 against Worcestershire and another in 1958 against Warwickshire. Having last played first-class cricket in 1958, Semmence made a single first-class appearance for Essex in 1962 against Oxford