Éamon de Valera (born with the name Edward George de Valera[1]), (October 14, 1882 – August 29, 1975), was one of the dominant political figures in 20th century Ireland. He served in public office from 1917 to 1973, holding the various Irish prime ministerial and presidential offices. A significant leader of Ireland's struggle for independence from the United Kingdom of Great Britain and Ireland in the early 20th century, and the Republican anti-Treaty opposition in the ensuing Irish Civil War, Éamon de Valera is the author of Ireland's constitution, Bunreacht na hÉireann.

At various times a mathematician, teacher and a politician, he served thrice as Irish head of government; as Príomh Aire, as the second President of the Executive Council and the first Taoiseach. He ended his political career as President of Ireland, serving two terms from 1959 until 1973. Éamon de Valera was also the Chancellor of the National University of Ireland from 1922 until 1975.

Revered and despised in equal measure throughout Ireland, during his lifetime and posthumously, Éamon de Valera is generally regarded as one of the most influential figures in the history of 20th century Ireland.