This project will explore the implications of existing patterns of condom use and the potential for interventions for increasing condom use on population-level HIV outcomes among adolescent sexual minority males (ASMM). We will first examine temporal trends and differences across age and race/ethnicity in condom use among ASMM using data from the Youth Risk Behavioral Surveillance System and the American Men’s Internet Survey. Then, we will use our existing mathematical model of HIV transmission in this population to understand how the observed data may have contributed to the current HIV epidemic among ASMM and how ongoing trends and potential condom-related interventions may affect the future of the epidemic. Modeling analyses will be conducted in scenarios with varying levels of PrEP use to explore the impact of these two key prevention interventions separately and in combination.