A casualty on tracks was reported at the station in Seven Sisters Road at around 3.45pm yesterday (February 23).
Officers and London Ambulance Service crews attended, however, the person was pronounced dead.
The incident is not being treated as suspicious, and a file will be prepared for the coroner.
A spokesperson for British Transport Police said: “Officers were called to Finsbury Park London Underground station at around 3.45pm on Sunday 23 February following reports of a casualty on the tracks.
“Paramedics also attended, but sadly a person was pronounced dead at the scene
“The incident is not being treated as suspicious and a file will be prepared for the coroner.”
If you feel affected by what has happened and wish to find support, you can contact the Samaritans on 116 123 for a confidential chat.
