Dáil Éireann served as the directly elected lower house of the Oireachtas of the Irish Free State from 1922 to 1937. The Free State constitution described the role of the house as that of a "Chamber of Deputies". Until 1936 the Free State Oireachtas also included an upper house known as the Seanad. Like its modern successor, the Free State Dáil was, in any case, the dominant component of the legislature; it effectively had authority to enact almost any law it chose, and to appoint and dismiss the President of the Executive Council. The Free State Dáil ceased to be with the creation of the modern 'Dáil Éireann' under the terms of the 1937 Constitution of Ireland. Both the Dáil and Seanad sat in Leinster House.

The Oireachtas of the Irish Free State was the legislature of the Irish Free State from 1922 until 1937. It was established by the 1922 Constitution of Ireland which was based from the Anglo-Irish Treaty. It was the first independent Irish Parliament officially recognised outside Ireland since the historic Parliament of Ireland which was abolished with the Acts of Union 1800.