Charles Alexander Best (July 7, 1931, in Toronto, Ontario – March 25, 1978) was a Canadian politician, farmer, nurseryman and scientist. He was elected to the House of Commons of Canada in the 1957 election as a Member of the Progressive Conservative to represent the riding of Halton. He was re-elected in 1958 and defeated in the elections of 1962 and 1963. He was the son of Charles H. Best, the Canadian medical scientist, and one of the co-discoverers of insulin. He died of a heart attack causing his father to later collapse and die.