Arnoldus Christiaan Vlok van Wyk (26 April 1916 – 27 March 1983) was a South African art music composer, one of the first notable generation of such composers along with Hubert du Plessis and Stefans Grové. Despite the strict laws imposed by the Apartheid government during his lifetime, van Wyk's homosexuality was ignored by the authorities throughout his career due to the nationalistic nature of his music.