Michael Kilroy (14 September 1884 – 23 December 1962) was an Irish politician and guerrilla leader. He was an Irish Republican Army (IRA) officer in his native County Mayo during the Irish War of Independence and Irish Civil War. Subsequently, he was a Sinn Féin and later Fianna Fáil Teachta Dála (TD) for Mayo South.
Michael Kilroy was born in Derrylahan townland, Newport, County Mayo on 14 September 1884. He was the son of Edward and Matilda Kilroy and one of ten in the family. He was a carpenter and coachbuilder and learned his trade in Claremorris when he was 16 years and lodged with the Stratford Family in Mount Street, Claremorris. He was married to Ann Leonard of Crossmolina and they had eight in family. As a child he was raised with his maternal grandmother who was also Kilroy in the townland of Carrickaneady, Newport and went to school in Culmore in the 1890s where he was greatly influenced by the nationalistically minded Martin Casey, the Head Master. Mr. Casey instilled in his pupils a great love of Irish history that would remain with Kilroy all his life.
A booklet on the life of Michael Kilroy was published in 2008, Michael Kilroy – A Life 1884 – 1962 and is available in Mayo County Libraries.
The IRA in West Mayo was relatively quiet until January 1921, when Michael Kilroy, who was described as, "a puritanical and ascetic blacksmith" took over command of the brigade after the previous leader Thomas Derrig was arrested by the British.
There were four Battalions in the West Mayo Brigade, The First Battalion was in Castlebar, the Second Battalion was in Newport, the Third Battalion was in Westport and the Fourth Battalion was in Louisburgh. In his earlier career with the Movement for Independence, Kilroy had been an organiser for the IRB in the west and had been one of the founder members of the Volunteer Company in Newport in February 1914 and was the O/C and also Quarter Master of the Mayo Brigade of the Irish Volunteers.
Kilroy formed a flying column of 40–50 men to carry out attacks on British forces in the area. On 6 May 1921, they suffered a reverse at Islandeady, when a British patrol came upon the IRA men cutting a road, 3 IRA members were killed and 2 captured.