Katharine Stephen (26 February 1856 – 16 June 1924) was a British librarian and later principal of Newnham College at Cambridge University.

[5] She went on to become Vice-Principal and, in 1911, Principal of the college during the First World War years,[6] and kept her seat on the Council after her retirement in 1920.

[5] Stephen sat for a portrait by her cousin Vanessa Bell but that painting is lost.

[8] Caroline's final book contained a short memoir written by Katherine.

It was designed by Joanna van Heyningen and was listed Grade II in 2018 with other post-modern buildings.