Sir Hilary Duppa Miller (6 March 1929 – 21 March 2015) was a British Conservative Party politician.
Hie was the son of Lieutenant-Commander Jack Duppa-Miller, GC, and Barbara Miller (née Barbara Buckmaster, daughter of the first Viscount Buckmaster, a former Lord Chancellor). Educated at Eton College, Miller graduated from Merton College, Oxford in 1956 and the University of London in 1962, and then entered colonial service in Hong Kong.
Miller unsuccessfully fought Barrow-in-Furness in 1970, and Bromsgrove in a 1971 by-election. He served as Member of Parliament (MP) for Bromsgrove and Redditch from February 1974 to 1983, and for Bromsgrove from 1983 until he retired in 1992. He is a former vice-chairman of the Conservative Party.
After retiring from politics, he joined the Society of Motor Manufacturers and Traders (SMMT), the trade association of the motor industry in the UK, as its chief executive. He modernised and transformed the somewhat staid society by introducing and implementing a strategy of commercialisation.
After a four-year term, he resigned from SMMT to become managing director and later chairman of Cosmopolitan Textiles Limited, a UK-based subsidiary of the Hong Kong textile conglomerate Mingley Corporation with a brief to take the company into the auto industry. This was achieved successfully as a second tier supplier of patented substrates, mainly for headliners.