Little is known about specific adaptive functioning impairments in intellectually‐able individuals with autism spectrum disorder. In adolescents (n = 22) and young adults (n = 22) matched on composite IQ scores, this study examined profiles of cognitive and adaptive functioning, and caregiver responses on individual Vineland‐II items. Adaptive functioning standard scores were significantly lower than IQ scores, and the adult group had significantly lower adaptive functioning standard scores than the adolescent group. Examination of caregiver responses to individual Vineland‐II items identified more than 100 potential intervention targets. Differences favoring the adult group were observed on only 16 items across all three adaptive functioning domains, suggesting that little skill development is occurring during the transition to adulthood. Future research will examine the relevance of identified intervention targets to optimal outcomes. Autism Res 2017,. © 2017 International Society for Autism Research, Wiley Periodicals, Inc. Lay Summary Adolescents and young adults with autism spectrum disorder (ASD) without intellectual disability demonstrated impaired adaptive functioning skills (i.e., age appropriate skills necessary for independent living). Development of adaptive functioning skills appears to slow with age among individuals without intellectual disability. Findings clarify the specific adaptive functioning skills that transition‐aged youth with ASD have difficulty completing independently and will inform the development of interventions to increase the likelihood of independent living in adulthood.