Welsh Language Society

Cymdeithas yr Iaith
Formation4 August 1962 (1962-08-04)
FoundersGareth Miles, Owain Owain, John Davies, Geraint Jones (Trefor)
TypeAdvocacy group
PurposeWelsh language rights
Welsh independence
HeadquartersAberystwyth, Wales
FieldsMinority language movement
Chairperson
Joseff Gnagbo
Websitecymdeithas.cymru

The Welsh Language Society (Welsh: Cymdeithas yr Iaith Gymraeg, also often abbreviated to Cymdeithas yr Iaith or just Cymdeithas in English) is a direct action pressure group in Wales campaigning for the right of Welsh people to use the Welsh language in every aspect of their lives. The chair of the Welsh Language Society since October 2025 is Owain Meirion. The organisation has been characterised as Welsh nationalist, and it officially supports Welsh independence.