Individuals with Autism Spectrum Disorder present with unique characteristics, and the interventions designed to address associated challenging behaviors must be highly individualized to best meet their needs and those of their families. This article reviews systems of care to support the child, adolescent, or adult with Autism Spectrum Disorder and/or Intellectual Disability. The review describes mental health/behavioral health services, Intellectual Disability and other support systems, and the systems involved in a child and adolescent’s life and transition to adulthood. The types of systems and services, as well as barriers, are delineated with a brief listing of Web sites and references.