St Michan's, a division of the parliamentary borough of Dublin, was a parliamentary constituency which returned one Member of Parliament (MP) to the House of Commons of the United Kingdom from 1918 until 1922, using the first past the post electoral system.
Arran Quay was transferred from the College Green division of the parliamentary borough.
[4] This reflected an increase in population in Dublin relative to the rest of Ireland, and an extension of the city's boundaries in 1900.
Under the Government of Ireland Act 1920, the area was combined with the Clontarf and St James's Divisions to form Dublin North-West, a 4-seat constituency for the Southern Ireland House of Commons and a single-seat constituency at Westminster.
[8] Therefore, after the dissolution of the House of Commons on 26 October 1922, no vote was held in Dublin North-West at the 1922 United Kingdom general election on 15 November, shortly before the Irish Free State left the United Kingdom on 6 December 1922.