Grahame Thomas (born 21 March 1938, Croydon Park, New South Wales) is a former Australiancricketer who played in 8 Tests from 1965 to 1966. After several seasons in which he established a reputation as a hard-hitting batsman for New South Wales in the Sheffield Shield, he made his Test debut a few days short of his 27th birthday against the West Indies in 1965. He played all 5 Tests in that series without notable success, and returned to the Test side in the 1965-66 Ashes series when Bobby Simpson was injured, making two fifties in the last 3 Tests of the series. He toured South Africa in 1966-67 but was not selected for any of the Tests, and retired from first-class cricket at the end of the tour at the age of 28. He was a reliable fielder who occasionally kept wicket in first-class matches.