Traumatic events such as abuse, bullying, and exposure to violence are commonplace among typically developing children and occur at least as often among those with autism spectrum disorder (ASD). Children with ASD are vulnerable to traumatization due to their deficits in social communication and emotion regulation. Research on posttraumatic symptoms among children with ASD is reviewed. Bullying has received much attention while there is a paucity of research on other types of trauma. Anxiety, social isolation, and developmental regression are associated with trauma. Further research is needed to clarify the symptom presentation and frequency of PTSD. Sensitive self-report measures are needed as well as validation of existing measures for assessing trauma in this population.