Reform School Girl is a 1957 film starring Gloria Castillo as a teenage girl who is sent to a reformatory. The film was directed by Edward Bernds and was produced by Samuel Z. Arkoff. Reform School Girl was one of many sexploitation films released by American International Pictures (AIP) during the 1950s and 1960s. AIP's films during this period were largely focused on juvenile delinquency. As part of the AIP formula, young girls were typically depicted as "good" or "bad", the latter of which were petty criminals, gang members, or the girlfriends of gang members. Other AIP films in the same genre included Drag Strip Girl, Hot Rod Girl, and High School Hellcats. Reform School Girl is available for on-line viewing at AMCtv.com. The film was released by American International Pictures as a double feature with Shake, Rattle and Rock.

Gloria Castillo was an American stage and motion picture actress of the 1950s and a businesswoman.