Oftentimes parents and professionals wonder about the difference between Obsessive-Compulsive Disorder (OCD) and autism spectrum disorder (ASD) due to the overlapping traits between the two. These include repetitive behaviors, adherence to strict routines, and/or an intense focus on specific topics/interests. We are here to clarify that although OCD and autism can look similar on the surface, they are two distinct conditions. Understanding their similarities and how they differ can help parents, educators, and professionals provide the right kinds of support. Let’s unpack what OCD really is, how it compares to autism, and the importance of recognizing both (when they occur together). Obsessive-Compulsive Disorder, or OCD, is defined by the DSM-5 as a mental health condition that involves the presence of obsessions, compulsions, or both. The following definition has been taken from the Substance Abuse and Mental Health Services Administration (2016).