Nicole Nievez, 35, of Fairway Road in Newark, died after she was removed from life support.
The crash happened at 2:23 p.m. Saturday at West 4th and Rodney streets.
Police say Alfredo Cosme, 46, of the 200 block of North Lincoln Street in Wilmington, struck Nievez after passing a car that had slowed to allow pedestrians to cross the street.
As this investigation continues, police are asking for the driver of a silver sedan to come forward. Police say the driver is only considered a witness and was not involved.
Anyone with information is asked to contact Wilmington Police.