1420 in Ireland

Events from the year 1420 in Ireland.

Incumbent

 * Lord: Henry V

Events

 * Luttrellstown Castle was completed.

Births

 * November 24 – James Butler, 5th Earl of Ormonde, Lord Lieutenant (d. 1461)

Deaths

 * Giolla na Naomh O hUidhrin, Irish historian and poet
 * Thomas FitzGerald, 5th Earl of Desmond