The purpose of the present study was to examine whether differences exist between reports of parental stress in Mexican American and Caucasian mothers of children with ADHD. A second purpose was to examine whether there were child and family characteristics that made unique contributions to levels of parenting stress in Mexican American parents of children with ADHD. A third purpose was to examine the role that level of acculturation plays in the Mexican American mothers' reports of stress. Dependent measures used in this study include the Parenting Stress Index (PSI) and the Child Behavior Checklist (CBCL)