West Donegal was a UK Parliament constituency in Ireland, returning one Member of Parliament from 1885 to 1922.
Prior to the 1885 United Kingdom general election the area was part of the Donegal constituency. From 1922, on the establishment of the Irish Free State, it was not represented in the UK Parliament.
This constituency comprised the western part of County Donegal, consisting of the barony of Boylagh and that part of the barony of Kilmacrenan contained within the parishes of Clondahorky, Gartan, Kilmacrenan, Mevagh, Raymunterdoney and Tullaghobegly and the townlands of Ballybolander, Boheolan, Cabra Brook, Cabra Glebe, Carnatreantagh, Carrick, Carrickyscanlan, Cloncarney, Dromore, Drumcavany, Keeloges, Maghernagran, Pollans, Roshin, Stackarnagh, Temple Douglas, Treanbeg and Tullanascreen in the parish of Conwal.
| Election | Member | Party | Note | ||
|---|---|---|---|---|---|
| 1885, December 1 | Patrick O'Hea | Irish Parliamentary | Resigned | ||
| 1890, May 30 | James Joseph Dalton | Irish Parliamentary | Party split | ||
| 1890, December 1 | Irish National League | ||||
| 1892, July 11 | Timothy Daniel Sullivan | Irish National Federation | |||
| 1900, October 3 | James Boyle | Irish Parliamentary | Resigned | ||
| 1902, April 25 | Hugh Alexander Law | Irish Parliamentary | |||
| 1918, December 14 2 | Joseph Sweeney | Sinn Féin | Did not take his seat at Westminster | ||
| 1922, October 26 | UK constituency abolished | ||||
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