Petr Kotik (surname originally Kotík) (born January 27, 1942, in Prague) is a composer, conductor and flutist living in New York City. He was educated in Europe (Prague Conservatory, graduated 1961; Vienna Music Academy, graduated 1966; AMU Prague, graduated 1969). From 1960 to 1963, Kotik studied composition privately with Jan Rychlík in Prague, and from 1963 to 1966 at the Music Academy in Vienna with Karl Schieske, Hans Jelinek, and Friedrich Cerha. In Prague, he founded and directed Musica Viva Pragensis (1961–64) and the QUAX Ensemble (1966–69). He came to the United States in 1969 at the invitation of Lukas Foss and Lejaren Hiller to join the Center for Creative and Performing Arts at the University at Buffalo.
Since 1983, Kotik has been living in New York City. Kotik is the founder and Artistic Director of the S.E.M. Ensemble, based in New York City, which presents both chamber and orchestra concerts. Kotik has received numerous commissions and composition grants, from the National Endowment for the Arts. Kotik received a 1996 Foundation for Contemporary Arts Grants to Artists Award. He is also known for his realization of the complete musical works of Marcel Duchamp.