Officers were called to reports of an assault at the Colonnades at 5.40pm yesterday (May 8).
The teenager was found injured and taken to a south London hospital for treatment.
His condition was later assessed as not life-threatening.
No arrests have been made and police enquiries continue.
Anyone with information is asked to call 101 and quote reference CAD 5737/08May
A spokesperson for Metropolitan Police said: “Police were called at about 5.40pm on Monday, 8 May to reports of an assault at The Colonnades in Croydon.
“Officers attended and found a male, believed to be aged 15 years old, suffering from a stab injury. He was taken to a south London hospital for treatment; his injury is not believed to be life-threatening.
“There have been no arrests and enquiries continue.
“Anyone with information is asked to call police via 101 quoting reference CAD 5737/08May.”
