About Denis J. O'Sullivan
Lived 1918 – 1987 (aged 69). Denis J. O'Sullivan was an Irish politician.
Denis James O'Sullivan (5 March 1918 – 20 July 1987) was an Irish Fine Gael politician. He was first elected to Dáil Éireann at his second attempt at the 1951 general election. He served as a Fine Gael Teachta Dála (TD) for various Cork constituencies until losing his seat at the 1965 general election. He served in the Second Inter-Party Government of John A. Costello as Government Chief Whip. He was a member of Seanad Éireann from 1965 to 1969.
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Important facts
People in Denis J. O'Sullivan's life
Named in this biography and alive at the same time
Related people
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Contemporaries
People whose lives overlapped Denis J. O'Sullivan's
Frequently asked questions
Who was Denis J. O'Sullivan?
Irish politician (1918-1987)
When was Denis J. O'Sullivan born?
Denis J. O'Sullivan was born on 5 March 1918 in County Cork.
When did Denis J. O'Sullivan die?
Denis J. O'Sullivan died on 20 July 1987.
What was Denis J. O'Sullivan's occupation?
Denis J. O'Sullivan was a politician.
What nationality was Denis J. O'Sullivan?
Denis J. O'Sullivan was Irish.
Sources & further reading
· Wikipedia: Denis J. O'Sullivan
· DBpedia: Denis J. O'Sullivan
Cite this page
APA: Biography.guide. (2026). Denis J. O'Sullivan. https://biography.guide/denis-j-o-sullivan/
MLA: "Denis J. O'Sullivan." Biography.guide, https://biography.guide/denis-j-o-sullivan/.
Chicago: "Denis J. O'Sullivan." Biography.guide. https://biography.guide/denis-j-o-sullivan/.
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