Nima Bendavood, 21, surrendered to UCLA police Saturday afternoon.
The suspect was taken to Los Angeles County Jail and bail was set at $100,000.
Bendavood is not a UCLA student, campus police said.
The incident happened between midnight and 12:30 a.m. on Oct. 12 at a fraternity located on Gayley Avenue, across the street from UCLA's campus.
Suspect sought in alleged sexual assault at UCLA fraternity party
Police released a photo of the suspect on Thursday.
The victim told police she did not know the suspect prior to the assault, which was reported to police about 12 hours after it happened.
Bendavood is scheduled to be in court on Tuesday.
The investigation is ongoing.
UCLA police asks anyone with information to contact the department's Detective Unit at 310-825-1491.