Robert Hiller (born 14 October 1942) is a former England international rugby union player.
He was dropped three times: in 1970 against France, even though he had been appointed captain at the start of the season, and England were thrashed, and he was immediately reinstated; in 1971 when he was left out against Wales; and in 1972 when he had already decided to retire at the end of the season.
In 1966, while he was studying at St Edmund Hall, Oxford, before he began his international rugby career, Hiller played eight first-class cricket matches for the Oxford University Cricket Club.
He later taught at Bec Grammar School in Tooting, London, where he had been a pupil.
From 1976 until his retirement, he taught mathematics at King's College School, Wimbledon.