It happened shortly after 11:30 p.m. Tuesday on the 6400 block of North 20th Street.
Police found the 42-year-old man lying on the front steps of a home stabbed in the back with a large kitchen knife.
Stabbing victim found with knife in back in West Oak Lane
He was pronounced dead at the scene.
Several people who were inside the home at the time are speaking with investigators.
Police said the victim did not live at that home, but he was from the neighborhood.
"Not sure if he was stabbed at this location or he was stabbed somewhere else and ran to this particular location, that we're not certain. It's still an investigation in progress," Philadelphia Police Chief Inspector Scott Small said.
One resident told Action News she heard nothing beforehand.
She said she was in bed Tuesday night, grieving the recent loss of a family member, when she found out this man had collapsed near her home.
She said she did recognize him from the neighborhood.
Police located surveillance cameras at a nearby school.
They were working to see if the video might help with the case.
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