Can young people with intellectual and developmental disabilities be known for their strengths? This mixed-method study explored the strengths of 427 youth and young adults with intellectual disability and/or autism (ages 13-21) from the vantage point of their parents. Using the Assessment Scale for Positive Character Traits-Developmental Disabilities (ASPeCT-DD), parents identified numerous strengths across multiple domains and factors. Every young person in the sample was described as having at least one strength ("Mdn" = 20, range 1-26), and their strength-related profiles varied widely. Higher ratings of strengths were predicted by greater involvement in community activities and use of speech as the primary mode of communication. Challenging behaviors predicted lower ratings of strengths. These findings challenge prevailing deficit-based views of young people with intellectual and developmental disabilities and offer a promising alternative for describing transition-age youth in terms of the strengths they bring to activities and relationships. We offer recommendations for future research and practice.