Henry Frederick Baker FRS[2] FRSE (3 July 1866 – 17 March 1956) was a British mathematician, working mainly in algebraic geometry, but also remembered for contributions to partial differential equations (related to what would become known as solitons), and Lie groups.

[4] He was educated at The Perse School before winning a scholarship to St John's College, Cambridge in October 1884.

Baker was one of the mathematicians (along with E. W. Hobson) to whom Srinivasa Ramanujan wrote before G. H. Hardy but his papers were returned without comment.

Gordon Welchman recalled that in the 1930s before the war Dennis Babbage and he were members of a group of geometers known as Professor Baker's "Tea Party", who met once a week to discuss the areas of research in which we were all interested.

Firstly in 1893, to Lilly Isabella Hamfield Klopp, who died in 1903, then he remarried in 1913, to Muriel Irene Woodyard.