Fr John Sullivan (8 May 1861 – 19 February 1933) was an Irish Jesuit priest who was known for his life of deep prayer and personal sacrifice. He is recognised for his dedicated work with the poor and afflicted, spending much of his time walking and cycling to visit those who were troubled, sick and dying in the villages around Clongowes Wood College school in County Kildare where he taught from 1907 until his death. From the 1920s onwards many people testified to the healing power of his prayers although he never claimed any credit or causation for himself.