Sexual harassment of college students may lead to more serious forms of sexual assault. Few studies have investigated sexual harassment predictors framed within competing theoretical perspectives. In this study, the literature is extended by examining (a) three types of sexual harassment on a college campus, (b) the nature of reporting, and (c) whether routine activities and self-control theories effectively explain sexual harassment. Findings indicate that one fourth of the participants in the sample were sexually harassed, assaulted students are extremely unlikely to officially report incidents, and measures of routine activities theory are important predictors of sexual harassment. Prevention and education policies should focus on increased reporting to university authorities and helping students understand the situational contexts in which these behaviors are likely to occur. (Contains 4 tables and 11 notes.)