1932 Eamon De Valera (Executive Council and Taoiseach)

After the Irish Civil War, De Valera went on to be at the forefront of Irish politics until the turn of the 1960s. He took over as president of the Executive Council from W. T. Cosgrave in 1932 and later, with the adoption of the Constitution of Ireland in 1937, became Taoiseach. With a total of 21 years in office, he is the longest-serving Irish head of government by total days served in the post. He resigned in 1959 upon his election as President of Ireland. By then, he had led Fianna Fáil fo…

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