The incident happened shortly before 8:00 a.m. Monday on the 5300 block of Oakland Street.
There, police say two suspects tied up the teen, even putting duct tape on her mouth, and fled the scene with an unknown amount of money.
The suspects were only described as one black male and one white male.
Both were wearing all black clothing.
Anyone with information can contact Philadelphia police at 215.686.TIPS (8477) or through phillypolice.com.