About Seán Ó Cionnaith
Lived 1938 – 2003 (aged 64–65). Seán Ó Cionnaith was an Irish politician.
Seán Ó Cionnaith (7 June 1938 – 16 February 2003 in Dublin) was an Irish socialist republican politician, and a prominent member of the Workers' Party.
He was born on 7 June 1937 in Creagh near Ballinasloe, County Galway, and was the second youngest of a family of five. His mother, Bridget, died when he was aged four and later stated that it had a profound and lasting effect on him. He left school at fourteen and got a job in a hardware store.
Ó Cionnaith joined the Irish republican movement as a teenager, and in the late 1950s he became a chief scout with Na Fianna Éireann, the movement's youth section. He moved to England in the late 1950s and worked as both a bus conductor in London and an organizer for Clann na hÉireann, before returning in the 1960s and basing himself in Dublin where he continued as a member of Sinn Féin.
Ó Cionnaith was a supporter of the efforts to move Sinn Féin into a more socialist position and was a close confidant of figures such as IRA Chief of Staff Cathal Goulding, along with Seán Garland and Tomás Mac Giolla. He strongly opposed the emergence of the Provisional Irish Republican Army, regarding its campaign as sectarian.
During the 1960s and early 1970s, Ó Cionnaith developed a number of campaigning organisations including the Dublin Housing Action Committee, the Gaeltacht Civil Rights Movement (Coiste Cearta Síbialta na Gaeilge), the Resources Protection Campaign and the campaign to end the control by private landlords over the fishing rights to Irish rivers and lakes. In the mid-1970s he organised an Anti-Imperialist Festival in Ireland, featuring delegates from the Palestinian Liberation Organisation, the African National Congress, the MPLA, and others.
On 15 February 2003, Ó Cionnaith joined over 100,000 Irish people who participated in a major march in Dublin against the impending US/UK-led invasion of Iraq. He died suddenly early the following morning at his home in Ballymun.
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Important facts
People in Seán Ó Cionnaith's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Seán Ó Cionnaith's
Frequently asked questions
Who was Seán Ó Cionnaith?
Irish politician
When was Seán Ó Cionnaith born?
Seán Ó Cionnaith was born in 1938 in Ballinasloe.
When did Seán Ó Cionnaith die?
Seán Ó Cionnaith died in 2003.
What was Seán Ó Cionnaith's occupation?
Seán Ó Cionnaith was a politician.
What nationality was Seán Ó Cionnaith?
Seán Ó Cionnaith was Irish.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Seán Ó Cionnaith. https://biography.guide/sean-o-cionnaith/
MLA: "Seán Ó Cionnaith." Biography.guide, https://biography.guide/sean-o-cionnaith/.
Chicago: "Seán Ó Cionnaith." Biography.guide. https://biography.guide/sean-o-cionnaith/.
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