1586 in Ireland

Events from the year 1586 in Ireland.

Incumbent

 * Monarch: Elizabeth I

Events

 * 23 September – Battle of Ardnaree in County Mayo: English troops under Sir Richard Bingham, governor of Connacht, defeat an Irish-Scottish mercenary army – led by the brothers Donald Gorm MacDonald of Carey and Alexander Carragh MacDonald of Glenarm (both of whom are killed) – fighting on behalf of the rebel Mac Philbins and Burkes.
 * c. December? – Richard Creagh, Roman Catholic Archbishop of Armagh, dies a prisoner in the Tower of London.
 * County Longford is shired, separating it from Westmeath.
 * Robert Gardiner is appointed Lord Chief Justice of Ireland.
 * Sir Edward Waterhouse is appointed Chancellor of the Exchequer of Ireland.
 * Elizabeth I of England and James VI of Scotland agree in the Treaty of Berwick that the MacDonnell family, claimants to the Glens of Antrim, have the right to stay in Ireland.

Births

 * Antony Hickey, Franciscan theologian (d. 1641)
 * William St Leger, Anglo-Irish landowner and military commander (d. 1642)

Deaths

 * 5 May – Henry Sidney, Lord Deputy of Ireland (b. 1529)
 * c. December? – Richard Creagh, Roman Catholic Archbishop of Armagh (b. c.1523)