A good Samaritan conducted CPR on the victim before responders arrived at the Excelsior II Luxury Apartments building on Prospect Avenue around 1 p.m., city Police Capt. Darrin DeWitt said.
The victim was taken with severe head trauma to nearby Hackensack University Medical Center, where she was pronounced dead, DeWitt said.
Investigators were trying to determine whether the incident was a possible jumper or accidental fall, he said.
Firefighters responded along with police and EMS.
A 57-year-old Hackensack man was killed in July when he threw himself off the balcony of his 7th-floor apartment at the Pierre Apartments directly across the street.
SEE: Hackensack Man, 57, Falls To Death From High-Rise Balcony
PHOTOS by CECILIA LEVINE
Click here to follow Daily Voice West Milford and receive free news updates.