On 7 June Sir James Craig, leader of the UUP, became the first Prime Minister of Northern Ireland.

[2] The Dublin University constituency returned four Independent Unionist candidates, also unopposed.

The four Independent Unionists met as the House of Commons of Southern Ireland on 28 June 1921, for one meeting only.

Those elected for Sinn Féin sat as the Second Dáil, calling themselves Teachtaí Dála (TDs).

Although the contemporaneous roll of Dáil membership included all those elected in both Northern Ireland and Southern Ireland, the database of Oireachtas members includes only those elected for Sinn Féin.