Authorities said Zayahshay Davis, 24, is wanted in connection with the death of Sariah Conover, 28.
The stabbing occurred Monday just before 6 p.m. in the 1300 block of West Lehigh Avenue, police said.
Investigators have not released additional details about the circumstances surrounding the incident.
Anyone with information on Davis' whereabouts is urged to call 215-686-TIPS.