Morgannwg
Morgannwg may refer to:
 Glamorgan, a historic county in south Wales, called  in Welsh
 Kingdom of Morgannwg, a medieval kingdom in the same area
 Morgannwg (journal), the journal of the Glamorgan History Society
 Iolo Morganwg (1747–1826), a Welsh antiquarian and poet

See also
Coleg Morgannwg, a former further education college in Rhondda Cynon Taf
Glamorgan (disambiguation)