This study examined differences between gang and individual offender rape incidents reported to the Chicago police. Analyses showed that victims and offenders in gang rape incidents were younger, more likely to be unemployed, but not different in marital status or race than victims and offenders in individual rapes (e.g., single offender, single victim crimes). Gang rapes were characterized by more alcohol and drug involvement, fewer weapons, more night attacks, less victim resistance, and more severe sexual assault outcomes compared with individual rapes. Regression analyses revealed distinct correlates of physical injury outcomes for gang and individual rape incidents. Implications for treatment and prevention of these types of assaults are discussed.