Elfed is a Welsh language place name and personal name. It commonly refers to one of two geographic areas:
- The Kingdom of Elfed (English: Elmet), an Old Welsh kingdom in what is now northern England during the Early Middle Ages
- Elfed, a cymwd (commote) of Cantref Gwarthaf (in modern Carmarthenshire, Wales), later anglicised to 'Elvet Hundred'
Elfed may also refers to:
- Cynwyl Elfed, a community in the cymwd of Elfed, Wales
- Elfed High School, in Buckley, Flintshire, Wales
- Elfed Davies, Baron Davies of Penrhys (1913–1992), Welsh politician
- Elfed Evans (1926–1988), Welsh professional footballer
- Howell Elvet Lewis hymn-writer, poet and Archdruid whose bardic name was Elfed
- Elfed Morris (born 1942), Welsh professional footballer