Fifty-four-year-old Susan Filiz was crossing the street in front of Freeport Memorial Hospital when she was hit by a school bus.
Filiz was transferred to Rockford Memorial where she died Monday night.
The preliminary cause of death is head injuries. The bus driver, Christine Braden, has been ticketed for failure to yield to a pedestrian in a crosswalk.
Freeport police say additional charges may be added.