Officers were called by the London Ambulance Service to Dawlish Road shortly before 11pm yesterday (June 8).
The man was found injured and treated at the scene before being taken to hospital.
His injuries are not thought to be life-threatening, but “may be life-changing”.
There have been no arrests, but a crime scene remains in place while an investigation is carried out.
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A spokesperson for Metropolitan Police said: “On Sunday, 8 June at 10.50pm police were alerted by the London Ambulance Service to reports of a stabbing in Dawlish Road, Tottenham.
“Officers attended alongside paramedics who treated a 55-year-old man at the scene before transporting him to hospital.
“His injuries are not believed to be life threatening, but they may be life changing.
“No arrests have been made at this stage.
“A crime scene remains in place and an investigation is underway.
“Anyone with information is asked to call 101 quoting CAD 7227/08JUNE25.”
