William St Clair, FBA, FRSL (born 1937) is a British historian, Senior Research Fellow at the Institute of English Studies, School of Advanced Study, University of London, and author.
William St Clair received his education at Kilsyth Academy, Comely Park School, Falkirk, Edinburgh Academy, and St John's College, Oxford.
William St Clair started his academic career as Fellow of Royal Society of Literature in 1973 He was Visiting Fellow at All Souls College, Oxford in 1981–82. In 1985 he became fellow of Huntington Library, California. Since 1992 he is fellow of British Academy, and was Member of Council from 1996 to 2000. From 1992 to 1996 he was also fellow of All Souls College, Oxford University. In the year 1998–99 he was Visiting Fellow Commoner, Trinity College, Cambridge University. From 1999 to 2006 he was fellow of Trinity College, Cambridge University, 1999–2006 Since 2005 he is Senior Research Fellow at the Institute of English Studies, School of Advanced Study, University of London. Since 2008 he is also Senior Research Fellow at the Centre for History and Economics, Cambridge and Harvard.
William St Clair is also chairman of Open Book Publishers, an academic publisher of peer-reviewed monographs in the humanities and social sciences since 2008. Since 2008 he is also member of the Enterprise Management Committee, Re Enlightenment Project, main partners New York University, New York Public Library, and University of Cambridge.
His research interests lie, in large part, in the history of books and reading, ancient Greece and biography. His Reading Nation in the Romantic Period notably, received praise, and was reviewed in over fifty scholarly journals; it is frequently cited by other academics. He is a founding member of Open Book Publishers, based in Cambridge (UK), and an active supporter of the Open Access movement.