North West Tyrone (UK Parliament constituency)
|North West Tyrone|
|Former County constituency|
|for the House of Commons|
|Number of members||One|
|Replaced by||Fermanagh and Tyrone|
|Created from||Mid Tyrone and North Tyrone|
Boundaries and boundary changes 
Prior to the United Kingdom general election, 1918 the area was the North Tyrone and part of the Mid Tyrone constituencies. From the dissolution of Parliament in 1922 North West Tyrone became part of the Fermanagh and Tyrone seat.
Arthur Griffith was also elected for East Cavan, but as he did not take his seat in the United Kingdom House of Commons he could not choose which area he would represent and trigger a by-election in the other.
Griffith died on 12 August 1922. Sinn Féin MPs were not prepared to attend the House of Commons, to apply for the writ for a by-election, so this seat was vacant at the dissolution of Parliament on 26 October 1922.
The First Dáil 
Sinn Féin contested the general election of 1918 on the platform that instead of taking up any seats they won in the United Kingdom Parliament, they would establish a revolutionary assembly in Dublin. In republican theory every MP elected in Ireland was a potential Deputy to this assembly. In practice only the Sinn Féin members accepted the offer.
The revolutionary First Dáil assembled on 21 January 1919 and last met on 10 May 1921. The First Dáil, according to a resolution passed on 10 May 1921, was formally dissolved on the assembling of the Second Dáil. This took place on 16 August 1921.
In 1921 Sinn Féin decided to use the UK authorised elections for the Northern Ireland House of Commons and the House of Commons of Southern Ireland as a poll for the Irish Republic's Second Dáil. Tyrone North West, in republican theory, was incorporated in an eight-member Dáil constituency of Fermanagh and Tyrone.
Member of Parliament 1918–1922 
|1918||Arthur Griffith||Sinn Féin|
The election in this constituency took place using the first past the post electoral system.
|General Election 14 December 1918: North West Tyrone|
|Sinn Féin||Arthur Griffith||10,442||57.57||N/A|
|Irish Unionist||William Thomas Miller||7,696||42.43||N/A|
|Sinn Féin gain from new seat||Swing||N/A|
See also 
- List of UK Parliament Constituencies in Ireland and Northern Ireland
- Redistribution of Seats (Ireland) Act 1918
- MPs elected in the UK general election, 1918
- List of Dáil Éireann constituencies in Ireland (historic)
- Members of the 1st Dáil
- Parliamentary Election Results in Ireland, 1801–1922, edited by B.M. Walker (Royal Irish Academy 1978)
- Who's Who of British Members of Parliament: Volume III 1919–1945, edited by M. Stenton and S. Lees (The Harvester Press 1979)
- Leigh Rayment's Historical List of MPs – Constituencies beginning with "T" (part 2)[self-published source][better source needed]