Dai Francis (1911–1981) was a British trade unionist, best remembered for his leadership of the South Wales Miners' Union during the 1970s.
As a member of the Gorsedd of the National Eisteddfod of Wales, he took the bardic name Dai o'r Onllwyn.
[1] Francis was born at Onllwyn, near Neath, Glamorgan.
[2] He became the first officer of the South Wales Miners' Union in 1959, and in 1963 became its General Secretary.
A member of the Communist Party from 1938, he championed the 'Parliament for Wales' campaign in the 1950s, the Anti-Apartheid Movement in the 1960s and 1970s and also served as Chair of the Wales Committee against Racism in the late 1970s.