Radnor Police descended on the Cabrini campus at 9:45 p.m. Sunday after someone called the student community phone on the second floor of Woodcrest Hall.
A student answered the phone and the caller stated that there was a bomb in the building.
The student who answered the phone notified authorities.
Radnor Police arrived and evacuated the residents to another dorm.
Cabrini spokeman Gene Castellano said after a thorough investigation, officers determined the threat was unfounded.
Students were allowed back inside by 12:30 a.m. Monday.
Woodcrest Hall houses a total of 155 students.