Self-determination is a potential predictor of in-school and postschool success, yet it has not previously been examined in youth and young adults who are deaf or hard of hearing (DHH). The present study used a cross-sectional survey design to examine the reliability and validity of the American Sign Language (ASL) version of the Self-Determination Inventory: Student Report (ASL SDI:SR) and to develop an understanding of mean self-determination strengths and areas of need in a sample of youth and young adults who were DHH; 221 participants completed the ASL SDI:SR, including individuals representing each type of educational setting and each type of communication mode. The component with the highest mean score was psychological empowerment; the lowest mean score was for self-realization. The findings showed that the ASL SDI:SR produced reliable scores. Implications for future practice and research are discussed.