Responding officers found a 33-year-old man with a stab wound on 31st Street SW and Berger Street around 5:40 p.m., local police said.
The unidentified victim was taken to a local hospital, where he is expected to survive.
Further details were not immediately known.
Anyone with information is asked to contact the Allentown Police Criminal Investigation division at 610-437-7721 or make an anonymous tip through the Allentown Police Tip411 app.
Click here to follow Daily Voice Drexel Hill-Upper Darby and receive free news updates.