MST may refer to:
The Master of Studies (rendered M.St. or MSt) is a postgraduate degree at the University of Oxford, University of Cambridge, The Australian National University and University of Dublin which typically requires both classroom study and the completion of a thesis. It is a lesser degree than the Doctor of Philosophy ( Ph.D.) or Engineering Doctorate (EngD) and is comparable to the Master of Arts, Master of Science and Master of Philosophy at other universities. An M.St. is generally considered equivalent to the French diplôme d'études approfondies (or DEA) or the Spanish Diploma de Estudios Avanzados (also DEA). In some instances the degree may be awarded to graduate students after completing several years of original research, but before the defence of a dissertation, or as a substitute for a Ph.D. thesis that is a marginal fail. In some cases it can serve as a provisional enrolment for the Ph.D.