Stefan Clive Reif OBE (born 21 January 1944) is professor emeritus at the University of Cambridge.
He was elected to a personal chair in medieval Hebrew studies and to a fellowship at St John's College at the University of Cambridge in 1998, and obtained the Litt.D.
He was awarded an honorary doctorate by the University of Haifa in 2014 for his Genizah work, his research into Jewish liturgy and his encouragement of young scholars.
He is a trustee of the Cambridge Traditional Jewish Congregation and a senior academic consultant to the Universities of Haifa and Tel Aviv in Israel.
He is on the International Advisory Committees of the ISDCL and of the periodical Ginzei Qedem, and is an Honorary Fellow of the Mekize Nirdamim Society for the Publication of Ancient Hebrew Manuscripts.