Mary Teresa Josephine Webber, FSA, FRHistS, FBA is a British palaeographer, medievalist, and academic. She has been a Fellow of Trinity College, Cambridge since 1997 and Professor of Palaeography at the Faculty of History, University of Cambridge since 2018.^[1][2][3][4] Webber studied Modern History as an undergraduate at Somerville College, Oxford.

In 2001, Webber was elected a Fellow of the Royal Historical Society (FRHistS).^[1][5] On 5 June 2003, she was elected a Fellow of the Society of Antiquaries of London (FSA).^[6] In July 2017, she was elected a Fellow of the British Academy (FBA), the United Kingdom's national academy for the humanities and social sciences.^[7]

From 2015 to 2016, Webber held the J. P. R. Lyell Reader in Bibliography at the University of Oxford. She therefore delivered the Lyell Lectures for that academic year: her lecture series was titled "Public Reading and its Books: Monastic Ideals and Practice in England c. 1000-c. 1300".^[8]

• Webber, Teresa (1992). Scribes and Scholars at Salisbury Cathedral c.1075- c.1125. Oxford: Clarendon. ISBN 978-0198203087.
• Webber, T.; Watson, A. G. (1998). The Libraries of the Augustinian Canons, Corpus of British Medieval Library Catalogues, vol. 6. London: British Library Publishing Division. ISBN 978-0712345019.
• Leedham-Green, Elisabeth; Webber, Teresa, eds. (2006). The Cambridge History of Libraries in Britain and Ireland: Volume 1, To 1640. Cambridge: Cambridge University Press. ISBN 978-0521781947.