Republic of Ireland Act Is Signed in 1949

Republic of Ireland Act

The Republic of Ireland Act was signed by the President of Ireland. It became law on 21 December 1948 and was brought into force on 18 April 1949, the 33rd anniversary of the Easter Rising.

Since Eamon De Valera had introduced his constitution (Bunreacht na hÉireann) in 1937, the Irish Free State, or Éire as it was renamed, was virtually an independent republic. However, de Valera dithered on proclaiming the 26 counties the Republic.

De Valera‘s hesitation was a sop to those who recognized the Republic as consisting of all 32 counties. He also did not wish to be the one whom history would indicate as having accepted the partition of Ireland as permanent.

As things stood, Éire claimed that the national territory covered the whole of Ireland but recognized the de facto state of Northern Ireland created under the partition of Ireland. It was De Valera’s ardent desire that reunification could be achieved peacefully.

In the 1948 general election the largest political party, Fianna Fáil, lost power to a coalition of parties and independents who were all in agreement that Fianna Fáil should be put out of government.

John A. Costello, a Fine Gael T.D. was appointed Taoiseach and it was Costello that same year, was to introduce to the Oireachtas the Republic of Ireland Bill. The Bill, which was passed by both the Oireachtas and the Seanad, put an end to the External Relations Act (1936) which recognized the British monarch to be king of Ireland, whilst the Taoiseach and the President of Ireland were merely local notables.

The Republic of Ireland Act did not change the name of the state of Éire (Ireland in English). However, it did change the description of the state and it invested the President of Ireland with executive power (on the authority and advice of the Government) or any executive function of the State or in connection with its external relations. In effect, Ireland was a free and independent nation.

The Republic of Ireland and Britain’s reaction

The Republic of Ireland Act became law on 21st December 1948 and came into force on 18th April 1949.

The British reacted to the Act by introducing the Ireland Act 1949 recognizing the Irish State leaving the  Commonwealth. Irish citizens were given a similar status as those of Commonwealth countries as part of British nationality law.

The Act also emphasized that Northern Ireland would never leave the United Kingdom except by consent and assuring that Northern Ireland’s social securities and schemes would be kept on a par with Britain’s. However, it did also retain a special citizenship and trade preference with the new Republic.


  • The Republic of Ireland Act, 1948. Website
  • Modern Ireland 1600-1972 by R. F. Foster. Penguin Books. London. 1989 edition
  • The Course of Irish History by T.W. Moody and F. X. Martin. Mercier Press. Dublin 2001 edition

Last updated October 10, 2020.

About the Author

Pádraig Mac Donnchadha
Pádraig is a fluent Irish speaker with a passion for history, traditional music, and story telling.