Na h-Eileanan an Iar (UK Parliament constituency)

Na h-Eileanan an Iar
County constituency
for the House of Commons
Boundary of Na h-Eileanan an Iar in Scotland
Subdivisions of ScotlandNa h-Eileanan Siar
Electorate21,177 (March 2020)
Major settlementsStornoway
Current constituency
Created1918 (as Western Isles)
Member of ParliamentTorcuil Crichton (Labour)
Created from

Na h-Eileanan an Iar (/nə ˈhɪlənən ən jɪər/; Scottish Gaelic pronunciation: [nəˈhelanən əˈɲiəɾ]), formerly Western Isles, is a constituency of the House of Commons of the Parliament of the United Kingdom, created in 1918. It elects one Member of Parliament (MP) by the first past the post system of election. It has been represented since 2024 by Torcuil Crichton of Scottish Labour.

The constituency was formed by merging areas which were formerly within the Ross and Cromarty constituency and the Inverness-shire constituency.

Na h-Eileanan an Iar is Scottish Gaelic for the Western Isles, which was the constituency's name prior to the 2005 general election. An identical constituency with the same name is used by the Scottish Parliament.

With around 21,000 registered voters, it has the smallest electorate of any constituency in the United Kingdom. It is expressly protected from being combined with other constituencies by the Parliamentary Voting System and Constituencies Act 2011.