Cyril Graham Primmer (19 April 1924 – 1 November 2003) was an Australian politician. Born in Warrnambool, Victoria, he was educated at state schools before becoming a dairy farmer at Koroit. He served in the military 1943-1945, and was a member of Belfast Shire Council. In 1970, he was elected to the Australian Senate as a Labor Senator for Victoria. He remained in the Senate until his retirement in 1984. Primmer died in 2003.