1900 in Ireland

Events

• 16 January – Three lion cubs reared by an Irish red setter went on view at Dublin Zoo.
• 17 January – The different sections of the Nationalist Party met in the Dublin Mansion House's Oak Room to promote national unity.
• 6 February – The Irish National League and Irish National Federation re-united within the Irish Parliamentary Party, with John Redmond elected as compromise chairman.
• 28 February – Unofficial figures showed that the Royal Dublin Fusiliers suffered the most in the Second Boer War.
• 12 March – The 45th Company of the Imperial Yeomanry left Dublin for service in South Africa.
• 17 March – In celebration of Saint Patrick's Day, the Lord Lieutenant, accompanied by his staff, reviewed a military display in the yard of Dublin Castle, followed by dinner and a ball in Saint Patrick's Hall that evening.
• 1 April – The Irish Guards regiment of the British Army was formed by order of Queen Victoria to honour the Irish troops fighting in the Boer War for the British Empire.
• 4 April – Queen Victoria arrived at Kingstown and travelled to Dublin where she was greeted by the Lord Mayor and members of the corporation.
• 7 April – 52,000 children greeted Queen Victoria at the Phoenix Park in Dublin.
• 23 April – At a meeting in Loughrea, County Galway, Douglas Hyde complained of the rapid anglicisation of the country and the loss of the Irish language.
• 11 May – Edward Carson became Solicitor General for England and Wales and was knighted.
• 13 May – The rift in the Irish Parliamentary Party was healed as John Dillon and John Redmond shared a platform for the first time in ten years.
• 5 July – The British War Office issued a list of Irish prisoners of the Boers from the 1st Battalion Royal Irish Fusiliers. It named 473 men from eight companies.
• 31 December – Ceremonies all over the country marked the closing of the 19th century and the dawning of the 20th.
• Richard J. Ussher and Robert Warren published The Birds of Ireland in London.

  Arts and literature

• The Irish Literary Theatre staged three plays at the Gaiety Theatre, Dublin with an English company: Edward Martyn's Maeve; Alice Milligan's The Last Feast of the Fianna; and George Moore's satirical The Bending of the Bough: a comedy in five acts.
• 'Moira O'Neill' published Songs of the Glens of Antrim.

  Sport

Association football

• ; International
• : 24 February Wales 2–0 Ireland
• : 3 March Ireland 0–2 Scotland
• : 17 March Ireland 0–2 England
• ; Irish League
• : Winners: Belfast Celtic
• ; Irish Cup
• : Winners: Cliftonville 2–1 Bohemians
• Derry Celtic was founded and joined the Irish Football League.

  Births

• 10 January – Harry Kernoff, artist
• 19 January – Frank Devlin, badminton player
• January – Michael Donnellan, founder of the Clann na Talmhan party and Teachta Dála
• 4 February – Robert Edgeworth-Johnstone, chemical engineer
• 16 February – John Stewart Collis, writer and pioneer ecologist and his twin Robert Collis, physician and writer
• 22 February – Seán Ó Faoláin, short story writer
• 27 February – James Ennis, cricketer
• 1 March – Nano Reid, painter
• 6 March – Mark Deering, Fine Gael party TD
• 25 May – John Hunt, expert on mediaeval art
• 10 July – Paul Vincent Carroll, dramatist
• 17 July – Paddy Smith, Fianna Fáil party TD and longest-serving member of Dáil Éireann
• 22 July – Michael Davern, Fianna Fáil TD for Tipperary South 1948–1965
• 20 August – Seosamh Mac Grianna, writer
• 26 August – Eudie Coughlan, Cork hurler
• 30 August – Martin King, Galway hurler
• 2 October – Hubert Butler, writer and historian
• 18 October – Sarah Makem, traditional singer
• 23 October
• * Paddy Ahern, Cork hurler
• * Hubert Butler, scholar, essayist and humanitarian
• 27 October – Peter Kerley, radiologist
• October – Frank Ryan, tenor
• 2 November – William Norton, Labour party leader, TD and Cabinet minister
• 19 November – Pamela Hinkson, writer
• 4 December – Tom Farquharson, association football player
• 23 December – Noel Purcell, actor
• Full date unknown – John Doherty, fiddle player

  Deaths

• 19 January – William Larminie, poet and folklorist
• 23 January – Abraham Boulger, soldier, recipient of the Victoria Cross for gallantry in 1857 at Lucknow, India
• 23 January – James Pearson, soldier, recipient of the Victoria Cross for gallantry in 1858 at Jhansi, India
• 7 March – Thomas Preston, scientist
• 16 March – Frederick William Burton, painter
• 22 March – Thomas Murphy, recipient of the Victoria Cross for bravery at sea in saving life in a storm off the Andaman Islands in 1867
• 26 April – John Hawkins Hagarty, lawyer, teacher and judge in Canada
• 2 July – Thomas Farrell, sculptor
• 12 November – Marcus Daly, businessman in America
• 30 November – Oscar Wilde, playwright, novelist and poet, died in France
• 14 December – Paddy Ryan, boxer
• Full date unknown – Thomas Workman, entomologist and arachnologist