Jacques Loussier (born 26 October 1934, Angers, France) is a noted pianist and composer. He is well-known for his jazz interpretations in trio formation of many of Johann Sebastian Bach's works, such as the Goldberg Variations.

In 1959 he formed the Play Bach Trio with bass player Pierre Michelot and percussionist Christian Garros. They used Bach's compositions as a base for jazz improvisation and had many live appearances, tours, and concerts, as well as a number of recordings. The group sold over six million albums in 15 years. Their most famous recording is "Air on the G String," which was used for the Hamlet cigar advertisements in the UK for over 35 years. Loussier also composed the theme tune for the popular 1960s French TV series Thierry La Fronde and the score for the motion picture Dark of the Sun.

In 1985 (300 years after Bach's birth), he re-formed the Play Bach Trio with two new partners, percussionist Andr Arpino and double bassist Vincent Charbonnier. Recent recordings include interpretations of compositions by Erik Satie, Claude Debussy, Maurice Ravel, Antonio Vivaldi, and more. A recording entitled Take Bach, made by the Trio along with the Pekinel sisters, features adaptations of Bach's concertos for two and three pianos.

Bassist Benot Dunoyer de Segonzac has also performed in the trio, replacing Charbonnier, on a number of albums and concerts from at least as early as 1998 (on the album "Satie: Gymnopdies Gnossiennes").

In 2004 a concert with music by Bach, Ravel, Debussy and Erik Satie was recorded live at St. Thomas Church, Leipzig.

In May 2008 the trio performed at the Bury Festival in Bury St Edmunds, UK.