Background: Legalization of recreational cannabis in Canada has increased the presence of cannabis in the public mind. There are online parent advocacy groups which are already calling for the use of cannabinoids in pediatric developmental and behavioural conditions such as Autism Spectrum Disorder (ASD). We set out to perform a rapid review of existing literature regarding use of cannabinoid products in the treatment of the behavioural domains of ASD. Methods: Key search terms were identified in collaboration with a medical librarian and combined into standardized search filters. A total of 55 articles were identified, of which only two included primary data regarding the use of cannabinoids to control behavioural symptoms of ASD in pediatric populations. Results: Both studies found significant reductions in the behavioural measures examined - which included inappropriate speech, irritability, stereotyped behaviours and self injurious behaviours - after treatment with Cannabinoids. Conclusions: The minimal existing evidence indicates the use of cannabinoid products may be useful in improving behavioural difficulties in children with ASD. However, there is a complete lack of well powered, rigorous studies. Further studies with larger cohorts are needed before any recommendations can be confidently made for or against the use of cannabinoids in this population.