About James O'Mara
Lived 1873 – 1948 (aged 75). James O'Mara was an Irish and British politician, diplomat and businessperson.
James O'Mara (6 August 1873 – 21 November 1948) was an Irish businessman and politician who became a nationalist leader and key member of the revolutionary First Dáil. As an MP in the House of Commons of the United Kingdom, he introduced the bill which made Saint Patrick's Day a national holiday in Ireland in 1903. He was one of the few politicians to have served both as member in the House of Commons and in Dáil Éireann.
Early life O'Mara was born in Limerick, son of Stephen O'Mara and Ellen Pigott, and educated by the Christian Brothers in Limerick, and at Clongowes Wood College. His studies at the Royal University of Ireland were postponed after the death of his Uncle Jim in 1893, when James was sent to London to take over his Uncle's business functions. After his marriage in 1895 to Agnes Cashel, sister of the republican activist in later life Alice Cashel, he moved to Epsom in Surrey, and then to Sydenham in London. He finally got his bachelor's degree from the Royal University in 1898.
Political career In the 1900 general election, O'Mara was elected unopposed for the Irish Parliamentary Party as MP for South Kilkenny.
His career in House of Commons is noted for his introduction of Bank Holiday (Ireland) Act 1903, making Saint Patrick's Day a national holiday. O'Mara later introduced the law which required that pubs be closed on 17 March, a provision which was repealed in the 1970s.
In 1907, O'Mara resigned from Parliament and from the Irish Parliamentary Party and later joined Sinn Féin, the first MP to do so. He returned to Dublin in 1914 to continue his work in the bacon business, and remained active in Sinn Féin.
Dáil Éireann At the 1918 general election, he was Sinn Féin's Director of Finance and the party's fourth Director of Elections (his three predecessors having been imprisoned). He was elected as a Sinn Féin MP for his old constituency of South Kilkenny, defeating the Irish Party's Matthew Keating by 8,685 votes to 1,855. Kilkenny South was one of 73 constituencies returning Sinn Féin MPs pledged not to take their seats at Westminster. In the First Dáil, he became Trustee of Dáil Éireann funds, and travelled to the United States with Éamon de Valera to pursue a fund-raising drive. He resigned his trusteeship after a disagreement with de Valera and he stood down from the Dáil at the 1921 election. and O'Mara was returned to the 4th Dáil, which sat until 1927. He did not contest the June 1927 general election, and retired from politics.
He died on 21 November 1948 and is buried in Glasnevin Cemetery, Dublin. His wife Agnes died on 2 June 1958.
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Important facts
People in James O'Mara's life
Named in this biography and alive at the same time
Contemporaries
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Frequently asked questions
Who was James O'Mara?
Irish politician and businessman (1873–1948)
When was James O'Mara born?
James O'Mara was born on 6 August 1873 in Limerick.
When did James O'Mara die?
James O'Mara died on 21 November 1948 in Dublin, Ireland.
What was James O'Mara's occupation?
James O'Mara was a politician, diplomat and businessperson.
What nationality was James O'Mara?
James O'Mara was Irish and British.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). James O'Mara. https://biography.guide/james-o-mara/
MLA: "James O'Mara." Biography.guide, https://biography.guide/james-o-mara/.
Chicago: "James O'Mara." Biography.guide. https://biography.guide/james-o-mara/.
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