The woman died on Thursday, Jan. 16, about a week after the crash, police said.
The incident happened around 5:20 p.m., Wednesday, Jan. 8 on Milbank Avenue in front of Agnes Morley Heights.
The victim, Elizabeth Deering, was hit by the vehicle driven by a 43-year-old Rye Brook man, Greenwich Police said.
The incident is currently under investigation by the department's traffic unit.
Anyone who may have witnessed the incident is asked to contact Officer Roger Drenth at 203-622-8014.
Click here to follow Daily Voice Fairfield and receive free news updates.