Challenges of young adulthood with T1D include transitioning to adult care, increased self-management responsibility, and developmental changes. Recognizing patterns of HRQOL across demographically and clinically diverse young adults with T1D may help identify who needs additional support as they transfer to adult healthcare. We hypothesized that young adults from racially, ethnically, and socioeconomically marginalized groups and those with higher A1c would report lower HRQOL. At baseline of a behavioral RCT (≤2 months after last pediatric T1D clinic visit), 82 young adults (Mage=19.9±1.3, MA1c=8.9±2.0%) self-reported demographics and HRQOL; A1c was analyzed via point of care or dried blood spot. ANOVAs, t-tests, and a regression model compare HRQOL by demographic (gender, race/ethnicity, insurance, school enrollment) and clinical variables (device use, A1c). As detailed in the table, HRQOL was significantly higher for participants in school and men (p<.01). Pump-users reported higher HRQOL on the “Handling Diabetes Well” and “Peer Relationships” subscales (p<.05). Regression analyses yielded gender and school enrollment as significant predictors of HRQOL (p<.01). Variability across groups of young adults with T1D suggests monitoring HRQOL may be helpful to identify T1D-specific psychosocial needs during this transition. Patterns suggest women and those not in school may benefit from additional support. Disclosure M.Baudino: None. M.E.Hilliard: None. S.A.Carreon: None. R.Streisand: None. T.S.Tang: Research Support; Juvenile Diabetes Research Foundation (JDRF), Speaker's Bureau; Abbott Diabetes, Insulet Corporation. S.Lyons: None. S.Mckay: None. B.J.Anderson-thomas: None. C.G.Minard: None. A.Butler: None. Funding National Institute of Diabetes and Digestive and Kidney Diseases (1R01DK119246 to M.E.H.)