The incident happened in Barclay Road at around 2.25pm today (September 25).
Officers and London Ambulance Service crews attended and found a man injured.
He was taken hospital for treatment where his condition was assessed as not life-threatening.
No arrests have been made as police enquiries continue.
A spokesperson for Metropolitan Police said: “Police were called at approximately 2.25pm on Monday, 25 September to reports of a stabbing in Barclay Road, Croydon.
“Officers and London Ambulance Service attended and found a man, aged in his 20s, suffering stab injuries.
“He has been taken to hospital for treatment – condition assessed as not life-threatening.
“A crime scene remains in place.
“No arrests; enquiries continue.
“Anyone with information is asked to contact police on 101 or ‘X’ @MetCC and quote CAD4044/25Sep.
“You can also provide information anonymously to the independent charity Crimestoppers on 0800 555 111.”
https://www.yourlocalguardian.co.uk/news/23812997.barclay-road-croydon-stabbing-man-taken-hospital/