Peter Vermeersch (born 1959 in Waregem) is a Belgian composer, clarinet player and producer.

He is a main character in several Belgian bands such as X-Legged Sally, A Group and the Flat Earth Society. His compositions, balancing between classical, jazz and pop music, are often commissioned for or used by modern dance companies.

As a producer he helped to form the first album of Belgium's most prominent indie band dEUS. As such, he is one of the godfathers of the Belgian music scene.