David Atherton OBE, (born 3 January 1944) is an English conductor and co-founder of the London Sinfonietta.
Atherton was born in Blackpool, Lancashire into a musical family. He was educated at Blackpool Grammar School. His father, Robert Atherton, was the Music Master at St Joseph's College, Blackpool and was also a conductor. His mother was a singer.
Atherton studied music at Fitzwilliam College at the University of Cambridge.
In 1967 Atherton was co-founder of the London Sinfonietta and, as its Music Director, a position he held until 1973, gave the first performance of many important contemporary works. It is now widely regarded as one of the world's leading chamber orchestras. Also in 1967 he was invited to join the music staff of the Royal Opera House, Covent Garden, by Sir Georg Solti. In 1968 he became the youngest conductor ever to appear there, conducting Il trovatore. He spent twelve years as Resident Conductor, giving over 150 performances. Also in 1968 he was the youngest conductor in the history of the BBC Proms and subsequently appeared in thirty consecutive seasons.
In 1976 he conducted for the first time at La Scala in Milan, Italy. In 1978 he conducted at the War Memorial Opera House, San Francisco, California in the United States. Then in 1980 he was appointed Music Director of the San Diego Symphony, a post he held until 1987 and Principal Conductor of the Royal Liverpool Philharmonic. In 1989 he founded the Mainly Mozart Festival in San Diego and was appointed Music Director of the Hong Kong Philharmonic Orchestra, a post he held until 2000.