Henry Sidgwick (May 31, 1838–August 28, 1900) was an English Utilitarian philosopher. He was one of the founders and first president of the Society for Psychical Research, a member of the Metaphysical Society, and promoted the higher education of women.
He was born at Skipton in Yorkshire, where his father, the Reverend W. Sidgwick (d. 1841), was headmaster of the local grammar school, Ermysted's Grammar School. Henry himself was educated at Rugby (where his cousin, subsequently his brother-in-law, Edward White Benson – later Archbishop of Canterbury – was a master), and at Trinity College, Cambridge. While at Trinity, Sidgwick became a member of the Cambridge Apostles. In 1859 he was senior classic, 33rd wrangler, chancellor's medallist and Craven