The current study investigated if condom outcomes vary as a function of perceived group support (from members of the group) and ethnic identity among participants in an HIV prevention intervention. The peer-led intervention consisted of an empirically supported curriculum, Sisters Informing Sisters on Topics about AIDS (SISTA) with an additional component that addressed the role of alcohol/drugs in risky sexual behavior. Participants included 263 unmarried, heterosexual, African American women who were recruited from three universities. At post-test, perception of a supportive group environment was associated with positive attitudes towards condom use. In addition, ethnic identity was associated with positive attitudes toward condom use and with higher condom negotiation efficacy. However, the study hypotheses were not supported because after controlling for pre-test scores, partner status, and relationship length these associations were no longer significant. The findings also indicated that participants reported more consistent condom use and condom protective attitudes at post- than at pre-test. Findings suggest that further research is needed to understand the role that support and ethnic identity plays in interventions for African American women.