Roderick Alexander Mackenzie OAM (born 17 October 1933) is an Australian politician. He was a member of the Victorian Legislative Council from 1979 to 1992, representing Geelong Province for the Labor Party (1979–1987) and then as an independent (1987–1992). A minister in the Cain government and President of the Victorian Legislative Council from 1985 to 1988, he resigned from the Labor Party in December 1987 and unsuccessfully recontested his seat in 1992 as part of the Geelong Community Alliance, a team of local independent candidates.