The objectives of this study were (a) to evaluate parental stress in parents of children with autism spectrum disorders (ASD group) and compare it with the stress in parents of children with typical development (comparison group); (b) to study the relationship between parental stress, autism severity, and both verbal and performance IQ; and (c) to study the relationship between parental stress and resilience. Parental stress in the ASD group was clinically significant and higher than in the comparison group. The child's autism severity was a significant predictor of parental stress related to the child's distractibility and hyperactivity. The child's verbal IQ was a significant predictor of parental stress in the child domain. Only for the ASD group, the child's performance IQ was a significant predictor of parental stress, and parental resilience was a significant predictor of parental stress related to depression and competence variables. These results and implications for intervention are discussed.