The shooting happened around 4:00 p.m. Tuesday in the 7300 block of Theodore Street.
Sources tell Action News that the 31-year-old woman from Delaware, and her 5-year-old daughter, were in front of the home of the child's father to pick him up and take him to a halfway house.
The father started walking to the car, where the mother and daughter were sitting, when someone opened fire, killing the woman.
The girl was injured by a stray bullet. She was taken to Children's Hospital of Philadelphia with a graze wound.
There no word yet on any suspects in this shooting.
Anyone with information can contact Philadelphia Police at 215-686-TIPS, text a tip to PPDTIP (773847) or through phillypolice.com.