It's just one of many statistics released today following a report by a Missouri senator.
Senator Claire McCaskill based the report on feedback from more than three hundred college campuses.
She found many universities don't make it easy for victims to report attacks anonymously.
Only about half of US colleges have a hotline victims can call, 44 percent give students the option of reporting attacks online.
The survey also found sexual assault charges go without any investigation.
More than 40 percent of schools said they had not conducted a single sexual assault investigation in the last five years even though they'd reported incidents to the Department of Education.
Click here to view the survey.