Records of Irish heads of government since 1922

The Taoiseach (plural: Taoisigh) is the head of government (or prime minister) of Ireland. Prior to the enactment of the Constitution of Ireland in 1937, the head of government was referred to as the President of the Executive Council. This office was first held by W. T. Cosgrave from 1922 to 1932, and then by Éamon de Valera from 1932 to 1937. By convention Taoisigh are numbered to include Cosgrave, for example Enda Kenny is considered the 13th Taoiseach not the 12th.

The first list is of all heads of Irish governments since 1922 by electoral history. The second list is by periods in office. The third list gives the total number of days served in office by each and the fourth is a list of individual terms served in order of length. The fifth list is by longevity and the sixth list is by age on entering and leaving office. The seventh is a list of officeholders still living and the eighth list shows a timeline of living/deceased officeholders.