Éire Nua, or "New Ireland", was a proposal supported by the Provisional IRA and Sinn Féin during the 1970s and early 1980s for a federal United Ireland. The proposal was particularly associated with the Dublin-based leadership group centered on Ruairí Ó Brádaigh and Dáithí Ó Conaill, who were the authors of the policy.
Éire Nua is still supported by the Continuity IRA, Republican Sinn Féin, Na Fianna Éireann and Cumann na mBan.
Éire Nua envisaged an all-Ireland republic that would be created when the British withdrew from Northern Ireland. It also involved the dissolution of the existing Republic of Ireland, which many republicans considered an illegitimate entity imposed by the British in 1922. Under Éire Nua, Ireland would become a federal state with parliaments for each of its four historic provinces, as well as a central parliament based in Athlone.
The purpose of the federal structure was twofold. Firstly, it was intended to show unionists in Northern Ireland that they would have some kind of self-government in a united Ireland. This would be achieved by the provision of a parliament, Dáil Uladh, for Ulster. However, by including all of historic Ulster—nine counties instead of the six in Northern Ireland—it was intended that the unionist majority would be slim enough to prevent abuses against the Catholic/nationalist population in the province.