Tristan Keuris (3 October 1946 in Amersfoort – 15 December 1996 in Amsterdam) was a Dutch composer.
At the age of 15 he started his studies with Ton de Leeuw at the Utrecht Conservatory.
Keuris received international recognition with the symphonic work Sinfonia (1972/74), first performance in 1976.
Many of Tristan Keuris works were written on commission, like the Saxophone Quartet Concerto (1986) on commission from the Dutch Government, Catena (1988), for the 100th anniversary of the Royal Concertgebouw Orchestra, Symphonic transformations (1987) for the Houston Symphony Orchestra and the Concerto for two cellos (1992) for the BBC (Manchester Cello Festival).
Keuris also composed music for television and radio commercials (1970s) and filmscores for "De Mannetjesmaker" and "Oeroeg" On the Emergo Classics label: On the Challenge Records International label: Complete Works (2010)