Allendale Association is a private nonprofit child and youth services organization headquartered in Lake Villa, Illinois. Its official website describes care, treatment, education, and advocacy services for children, youth, and families.

Allendale's psychology internship materials describe the organization as a private, not-for-profit agency that provides residential treatment, education, and clinical services. Public job materials continue to identify Allendale as serving children and adolescents through residential and educational programs (Allendale internship brochure, Allendale careers).