Parents of children with ASD often demonstrate high levels of stress and associated health problems. A gap in knowledge exists regarding the associations between chronic stress and mental and physical health of parents of young children with ASD, in which fathers have been understudied. In 181 parents (98 mothers, 83 fathers) of 99 young children with ASD chronic stress was measured using parental self-report and hair cortisol concentration (HCC) analysis. Parental mental health and eating behavior was measured using questionnaires. Physical health was evaluated by Body Mass Index, waist circumference, blood pressure, cholesterol, triglycerides, and glucose.. Parental HCC was related with child HCC (r