Ormeau, a division of Belfast, was a UK parliamentary constituency in Ireland. It returned one Member of Parliament (MP) to the House of Commons of the United Kingdom from 1918 to 1922, using the first past the post electoral system.

The constituency was created by the Redistribution of Seats (Ireland) Act 1918 from an area which had been in the Belfast South constituency. It comprised the eastern half of South Belfast, and contained the then Ormeau ward of Belfast Corporation.^[1]

It was in use at the 1918 general election only, and under the Government of Ireland Act 1920 its area was again part of the Belfast South constituency, with effect at the 1922 general election.

The constituency was a strongly unionist area. This was evident in the very low performance by Sinn Féin in the 1918 election.

After the 1918 election, Sinn Féin invited all those elected for constituencies in Ireland to sit as TDs in Dáil Éireann rather than in the House of Commons of the United Kingdom.^[2] All those elected for Irish constituencies were included in the roll of the Dáil but only those elected for Sinn Féin sat in the First Dáil.^[3] In May 1921, the Dáil passed a resolution declaring that elections to the House of Commons of Northern Ireland and the House of Commons of Southern Ireland would be used as the election for the Second Dáil and that the First Dáil would be dissolved on the assembly of the new body.^[4] The area of Belfast Ormeau would then have been represented in the Dáil by the four-seat constituency of Belfast South, which also returned no representatives for Sinn Féin.

• List of United Kingdom Parliament constituencies in Ireland and Northern Ireland
• List of MPs elected in the 1918 United Kingdom general election
• Historic Dáil constituencies

This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (May 2020) (Learn how and when to remove this message)

• Walker, Brian M., ed. (1978). Parliamentary Election Results in Ireland, 1801–1922. Dublin: Royal Irish Academy. p. 384. ISBN 0901714127.
• Stenton, M.; Lees, S., eds. (1979). 'Who's Who of British members of parliament: Volume III 1919–1945. The Harvester Press.
• (Information about boundaries of the constituency derived from the map of Northern Ireland Parliament constituencies (in force from 1921) and the wards included in the Belfast UK Parliament seats (in force 1922) for which see Northern Ireland Parliamentary Election Results 1921–1972, by Sydney Elliott (Political Reference Publications 1973) and Boundaries of Parliamentary Constituencies 1885–1972, compiled and edited by F.W.S. Craig (Political Reference Publications 1972) respective

• The Irish General Election of 1918
• Leigh Rayment's Historical List of MPs – Constituencies beginning with "O"