About 26% of undergraduate women experience rape or sexual assault involving physical force, violence, or incapacitation during their time in college. That figure comes from national survey data cited by RAINN, the country’s largest anti-sexual violence organization. Other large-scale studies place the range between 18% and 20% when looking specifically at rape or sexual assault over a full college career, while smaller annual snapshots find roughly 3% of college women experience completed or attempted rape in a single academic year.
The gap between these numbers reflects differences in how surveys define sexual assault, how long of a time period they cover, and whether they include nonconsensual touching alongside penetration. But regardless of methodology, every major study points to the same conclusion: sexual violence on college campuses is far more common than official crime statistics suggest.
Why Official Numbers Look So Different
Campus crime reports dramatically undercount sexual assault. In one analysis by the National Institute of Justice, only about 0.02% of enrolled students reported a forcible sex offense to campus or local police in a given year. Compare that to the 3% annual rate found in confidential student surveys, and the scale of underreporting becomes clear. An estimated 90% of campus sexual assaults are never reported to any authority.
There are many reasons for this. Survivors often know their attacker, which complicates the decision to come forward. They may not be sure what happened qualifies as assault, particularly when alcohol was involved. Fear of not being believed, concern about social consequences, and confusion about reporting processes all play a role. The result is that official campus crime data captures only a tiny fraction of what’s actually happening.
The “Red Zone”: August Through November
More than half of all college sexual assaults occur in just four months: August, September, October, and November. This period, known as the “red zone,” spans from move-in through Thanksgiving break. First-year students are especially vulnerable during this window, when they’re navigating new social environments, attending parties where they don’t know many people, and adjusting to a level of independence they haven’t had before.
Most Perpetrators Are Known to the Victim
Ninety percent of college women who are raped or face attempted rape know their attacker. According to the U.S. Department of Justice, the most common perpetrators are, in order: classmates, friends, boyfriends, ex-boyfriends, and other acquaintances. Stranger rape on campus is relatively uncommon. Date rapes specifically account for about 13% of completed college rapes, though they make up 35% of attempted rapes.
This pattern matters because it shapes how survivors process what happened and whether they seek help. When the person who assaulted you is someone in your friend group or social circle, reporting can feel like it carries a higher personal cost, and the experience itself can be harder to categorize clearly.
Greek Life and Elevated Risk
Students involved in fraternities and sororities face higher rates of sexual violence than their peers. In one study published in the journal Dignity, 38% of sorority-affiliated women reported experiencing attempted or completed rape, compared to 15.3% of women not in Greek life. For nonconsensual sexual contact more broadly, 48.1% of sorority members reported an experience, versus 33.1% of non-affiliated women.
After adjusting for other factors, women in Greek life were 3.39 times more likely to have experienced attempted or completed rape than non-Greek women. Men in Greek organizations also faced elevated risk of nonconsensual sexual contact, at 3.59 times the rate of non-affiliated men. The social dynamics of Greek life, including party culture, hierarchical structures, and close-knit loyalty norms, are frequently cited as contributing factors.
LGBTQ+ Students Face Higher Rates
Sexual orientation significantly affects risk. Bisexual women in college reported sexual assault at a rate of 17.3%, compared to 6.5% for heterosexual women. Women who identified as queer, pansexual, or used other terms reported rates as high as 34.8%, though that finding came from a small sample. Taken together, sexual minority women experienced assault at 14.7%, more than double the rate for heterosexual women in the same study.
These disparities likely reflect a combination of factors, including targeted victimization, higher rates of prior trauma, and social marginalization that can make it harder to access support.
College Women Now Face Higher Risk Than Non-Students
A Washington State University study found a striking shift in recent years. Between 2015 and 2022, the six-month risk of sexual violence was 74% higher for college-enrolled women ages 18 to 24 than for women the same age who weren’t in college. That represents a reversal from 2007 to 2014, when risk levels were roughly equal between the two groups, and from earlier decades when non-college women actually faced higher rates.
The highest prevalence during that 2015 to 2022 period was among women living on campus. On average, about 1 in 100 women in on-campus housing reported an instance of sexual violence during each six-month period. The reasons behind this shift aren’t fully understood, but the finding challenges the assumption that college campuses have become safer over time. While awareness and prevention programming have expanded, the data suggests the problem has grown relative to the broader population.