George Derek Varnals (24 July 1935 – 9 September 2019) was a South African cricketer who played in three Test matches in the 1964–65 season. Varnals was a right-handed batsman. The South African cricket commentator Charles Fortune described him as "a compact and correct player with a good range of shots that came more of timing than of power". He played South African domestic first-class cricket, for Eastern Province, Transvaal and Natal, between 1955 and 1965. Apart from the 1957–58 season, when he averaged more than 50 runs per innings and made his highest score – 151 not out in Eastern Province's total of 267, when he opened the innings against Border and carried his bat – his record was relatively modest until 1964–65.