11 February – Abortive Fenian attempt to seize Chester Castle.
5 March – Fenian Rising in County Dublin, County Cork, County Limerick, County Tipperary and County Clare.
12 July – Despite the Party Processions Acts, the Orange Order parades from Bangor to Newtownards in County Down. It is organised by William Johnston (sentenced to a short term in prison the next year for his actions) and about 30,000 take part.
August – Irish Republican Brotherhood convention at Manchester appoints Colonel Thomas J. Kelly to succeed James Stephens.
11 September – Thomas J. Kelly and Timothy Deasy are arrested in Manchester.
18 September – Rescue of Kelly and Deasy from a police van in Manchester; one policeman is shot.
12 October – 62 Fenians are among the last group of convicts to suffer penal transportation as the convict ship Hougoumont departs from Portsmouth on an 89-day passage to Western Australia.
23 November – William Allen, Michael Larkin and Michael O'Brien, the 'Manchester Martyrs', are hanged in Salford for their part in the rescue of Kelly and Deasy.
13 December – Clerkenwell explosion at Clerkenwell Prison in London during a Fenian escape attempt; 12 local residents are killed.
Royal Irish Constabulary granted its "Royal" prefix by Queen Victoria.
1 January – Thomas Westropp Bennett, Cumann na nGaedheal member of the Seanad, Cathaoirleach of Seanad (died 1962).
25 January – Dolway Walkington, Irish national rugby union captain (died 1926).
9 February – James Douglas, journalist (died 1940).
10 April – George William Russell, critic, poet and artist (died 1935).
19 April – James Cullen, priest and mathematician (died 1933).
13 May – Thomas Gann, doctor, archaeologist and writer (died 1938).
15 May – Eoin MacNeill, scholar, nationalist and revolutionary (died 1945).
17 June – John Robert Gregg, creator of Gregg Shorthand (died 1948).
11 August – Martin Morris, 2nd Baron Killanin, barrister and politician (died 1927).
10 November – John Henry Patterson, soldier, hunter and writer (died 1947).
16 December – Amy Carmichael, Christian missionary and writer (died 1951).
26 December – Ella Young, poet (died 1956).
Undated – Cathal O'Byrne, singer, poet and writer (died 1957).
7 February - William Dargan, engineer and railway builder (born 1799).
22 February - Daniel Devlin, businessman and City Chamberlain in New York (born 1814.
12 April - Robert Bell, journalist and writer (born 1800).
20 April - John Lyons, soldier, recipient of the Victoria Cross for gallantry in 1855 at Sebastopol, in the Crimea (born 1823).
17 September - Francis Blackburne, Lord Chancellor of Ireland (born 1782).
23 September - Richard W. Dowling, victorious commander at the Second Battle of Sabine Pass in the American Civil War (born 1838).
31 October - William Parsons, 3rd Earl of Rosse, astronomer and builder of the "Leviathan of Parsonstown" (born 1800).
10 December - Edward Whelan, politician, one of the Fathers of the Canadian Confederation (born 1824).
George Crawford Hyndman, auctioneer and amateur biologist (born 1796).
1867 in Ireland Wikipedia
Events from the year 1867 in Ireland.