According to the literature, rates of sexual victimization in American prisons range from 41 percent to less than 1 percent. Based on a meta-analysis of the research, a conservative "average" prevalence estimate of prison sexual assault was estimated at 1.9 percent (Gaes and Goldberg, 2004). Rates are higher when the definitions of perpetrator and victimization are broadly defined, since unwanted and sexually suggestive touching are more common in prisons than rape. The most integrative of the typologies relevant to prison sexual victimization was developed by Sparks (1982). Sparks identifies six explanatory factors for victimization: facilitation, precipitation, vulnerability, impunity, attractiveness, and opportunity. Sexual orientation, race, and physical appearance have been identified as characteristics that make an inmate vulnerable to sexual assault. Also, prior sexual victimization has been found to be an important risk factor for subsequent victimization. Other factors related to inmate sexual victimization are type of facility (male, general population; female, general population; male, sex offender treatment prison); mean age of inmate population; and age, race, ethnicity, education, mental health status, criminal history, and impressions of gang affiliation. The reduction in sexual victimization requires that prison officials and researchers identify those inmates at high risk for sexual victimization, develop effective placement strategies that minimize the proximity of predatory inmates to those at risk of sexual victimization, and train correctional officers and inmates in the meaning and practice of "zero tolerance" for sexual offenses in prison. 4 tables, 51 references, and appended data on the characteristics of male and female inmates related to the type and frequency of unwanted sexual contact