Joseph Armand Castro (August 15, 1927 – December 13, 2009) was an American bebop jazz pianist, based primarily on the West Coast of the United States.

Castro was born in Miami, Arizona on August 15, 1927. Castro began playing professionally at the age of 15 in the San Francisco Bay area. After army service ended in 1947, he formed a small band. In 1956 Castro moved to New York City, where his trio appeared in jazz clubs. In 1958, he moved to Los Angeles, where he joined Teddy Edwards‘ quartet. Castro recorded two albums as a leader for Atlantic Records: Mood Jazz in 1957 and Groove Funk Soul in 1960.