The working library of Betjeman has been held at the University of Exeter Library (Special Collections) since 1997: EUL MS 117 contains manuscripts of stray archival materials found loose within the working library collection.
Other papers of Betjeman are found in many UK repositories, including the following: British Library, University of Oxford (Bodleian Library; St. Edmund Hall, Merton, Pembroke, Christ Church, Worcester Colleges), University of Cambridge (University Library, King's, Clare, Emmanuel, Magdalene and Clare Colleges), University of Leeds (Brotherton Library), University of Durham, University of Hull, University of Reading, University College London, Trinity College Dublin, Cheltenham College, Eton School, Clifton College (Bristol), Northamptonshire Record Office, Birmingham Reference Library, Highgate Literary and Scientific Institution, London Metropolitan Archives, National Sound Archive, BBC Written Archives Centre, Royal Society of Literature, Royal Institution, Tate Gallery, British Library, National Library of Wales and the National Library of Scotland. Papers are also held at the University of Victoria Library, Canada, and the Lockwood Library, State University of New York, Buffalo, USA.