The family of Heather Flynn, 24, filed a missing persons report after not hearing from her for three days last week.
Kent Police Lt. James Prusha said during the search officers tried calling Flynn's friends, family and tracing her cellular phone activity.
"Finally … she found out we were looking for her and she called from Pennsylvania and said she was fine," he said.
Prusha said officers confirmed Flynn's identity on the call and corroborated her status with her father.
Fliers started to circulate around campus last week asking people to look for Flynn, who KentWired reported was last seen Tuesday at the Kent State Library.
Prusha said officers were on the verge of getting a subpoena for her credit card information to track recent purchases when she called police Saturday. She also had been entered into a nationwide missing persons database.
"When we get a report of somebody missing like that, we really take it seriously ... Because you never know," he said.
Editor's note: this story was updated with information from Kent Police Lt. James Prusha at 11:45 a.m.