Reginald Albert Barnett (born 15 October 1945) is a British retired cyclist who competed at the 1968 Summer Olympics..
Barnett represented the England team in the 1,000 metres match sprint, at the 1966 British Empire and Commonwealth Games in Kingston, Jamaica.
At the 1968 Olympic Games in Mexico City, he competed in the sprint event.
He was the national sprint champion on six occasions in 1967, 1968, 1969, 1970, 1972 and 1973.