Sarah Rosamund Irvine Foot, FSA, FRHistS (born 23 February 1961) is an English Anglican priest and early medieval historian.

She then went up to Newnham College, Cambridge, to study at the Department of Anglo-Saxon, Norse, and Celtic, where she was taught by, amongst others, Rosamond McKitterick and Simon Keynes, completing that tripos in 1983.

[10] On 22 February 2007 Queen Elizabeth II appointed Foot to the Regius Chair of Ecclesiastical History at the University of Oxford.

The professorship is also annexed to a canonry at Christ Church, although the post-holder need be only a layperson; and at a special ceremony on 6 October 2007 Foot was installed as residentiary canon of the cathedral.

[17] In March 2023, Foot's appointment as the Dean of Christ Church was approved by King Charles III.

She also works on the history of the early medieval church and society as well as the invention of the English in historiography, and historical theory.

She contributed to an episode of BBC Radio 4's In Our Time on the life of St Cuthbert, broadcast in January 2021.