This study examined relationship power as a possible mediator of the relationship between dating violence and sexually transmitted infections (STIs). The proposed mediation model was based on the theory of gender and power as well as previous research on intimate partner violence and STI risk. Survey results from a sample of 290 single, undergraduate women indicated that 85% experienced at least one form of dating violence victimization in the past year, 5.9% tested positive for an STI, and 5.2% received treatment for an STI. Results revealed that women with lower levels of sexual relationship power had higher rates of dating violence victimization and STIs; also, sexual relationship power partially mediated the relationship between dating violence victimization and STIs. Future dating violence and STI-prevention interventions targeting young women may want to use an empowerment approach to decrease their likelihood of dating violence victimization and STI risk. (Contains 3 figures and 3 tables.)