Guided by the Theory of Planned Behavior (TPB), the authors examined prospective associations of attitudes, norms, and control with sexual aggression (SA) perpetration 1 year later among male college students. Data were collected from 652 males via confidential, self-report surveys at the end of their 1st and 2nd years in college. Results indicated that attitudes conducive to SA and perceived norms supportive of SA were associated with a higher likelihood of engaging in SA 1 year later, and mediated the associations of some established risk factors for SA. The findings identify potentially changeable risk factors for perpetrating SA and can thus contribute to the foundation on which to build theoretical and empirically based prevention programs. (Contains 2 figures.)