Cambrian Medieval Celtic Studies is a bi-annual academic journal of Celtic studies, which appears in summer and winter. The journal was founded as Cambridge Medieval Celtic Studies in 1981 by Patrick Sims-Williams, who has remained the journal's editor to this day. It was given its present title beginning with volume 26 in 1993.

Cambrian Medieval Celtic Studies

Discipline	Celtic studies
Language	English
Edited by	Patrick Sims-Williams
Publication details
Former name(s)	Cambridge Medieval Celtic Studies
History	1981—present
Publisher	University of Aberystwyth (Wales)
Frequency	Biannual
Standard abbreviations ISO 4 (alt) · Bluebook (alt1 · alt2) NLM (alt) · MathSciNet (alt )
ISO 4	Cambr. Mediev. Celt. Stud.
Indexing CODEN (alt · alt2) · JSTOR (alt) · LCCN (alt) MIAR · NLM (alt) · Scopus
ISSN	1353-0089
OCLC no.	29451318

CMCS Publications went on to widen its publishing output to monographs, such as Helen McKee's The Cambridge Juvencus manuscript glossed in Latin, Old Welsh, and Old Irish: Text and Commentary (2000) and Marged Haycock's Legendary Poems from the Book of Taliesin (2007).