The Welsh Bibliographical Society (Y Gymdeithas Lyfryddol Gymreig) was founded in 1907 to promote the study of Welsh bibliography, publishing, printing and writing. Its principal activities were an annual meeting and lecture and publication of the Journal of the Welsh Bibliographical Society and monographs. The Journal contains scholarly articles on Welsh writers, bibliographic research, and society notes in English and Welsh. It was published annually from 1910 to 1984.

It is being digitised by the Welsh Journals Online project at the National Library of Wales

National Library of Wales

The National Library of Wales , Aberystwyth, is the national legal deposit library of Wales; one of the Welsh Government sponsored bodies.Welsh is its main medium of communication...

and is considered by the Library as one of "the most significant journal and periodical titles" in Wales.