This study examines and extends the confluence model of age identity by testing whether young people's self-perceptions as adults are linked to role transitions, self-assessed personal qualities, and social location. We propose that young people's sense of adulthood and the factors associated with it vary based on socially structured experience tied to race/ethnicity, socioeconomic status, and age. Analyzing data from 18-28 year olds in the National Longitudinal Study of Adolescent Health, we find racial/ethnic and socioeconomic status differences in age identity. Consistent with the confluence model, both role transitions and personal qualities are associated with age identity, although the most salient roles and qualities differ somewhat across racial/ethnic groups and consistently by socioeconomic status and age. We discuss the implications of these findings for understanding the transition to adulthood and adult identity, and for the young people themselves. (Contains 8 footnotes, 6 tables, and 2 figures.)