Parents of children with autism spectrum disorders (ASD) consistently report executive functioning (EF) deficits. This study investigates the factor structure of the Behavior Rating Inventory of Executive Function (BRIEF) as reported by parents of children with ASD and typically developing children (TDC). BRIEFs for 411 children with ASD and 467 TDC were examined. Confirmatory factor analysis of a nine-factor model met thresholds for goodness-of-fit in TDC, but not in the ASD sample. We found globally elevated EF problems in the ASD sample, especially on the Shift scale. These findings confirm that children with ASD exhibit significant EF deficits. Further investigation is needed to understand the pervasive nature of cognitive inflexibility in children with ASD.