Kristian Thompson, 20, from the Atlanta area, died about 3:50 p.m. in her room at University Village, said Mark Bowen, the chief deputy coroner.
Bowen said Thompson -- a junior psychology major active in campus activities -- had been sick for a number of days, and her condition worsened despite a visit to the doctor and medication.
The university is planning a memorial service for Thompson in the Student Activity Center Ballroom at noon today, according to ASU President William A. Bloodworth Jr.
"We are really concerned," he said. "We're trying to get as much support as we can to help."
Kathy Schofe, ASU's director of public relations and publications, said Thompson was very involved on campus.
She was a student orientation leader, was involved in the First-Year Experience program, was a resident assistant at University Village and also worked as a student assistant in the Dean of Students Office. She was also a member of Alpha Delta Pi sorority.
"We are deeply saddened, and our heart goes out to her family and her many friends," Schofe said.
"She had many friends here at ASU. She just touched so many lives."
The residents of University Village are planning a candlelight vigil at 6 tonight at the village, Schofe said.
"Purple was her favorite color, so they have encouraged people to wear purple to the vigil," she said.
Bowen said the autopsy will be conducted at the Georgia Bureau of Investigation Crime Lab in Augusta.
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