The Outer Hebrides, (officially known by the Gaelic name, Na h-Eileanan Siar) comprise an island chain off the west coast of Scotland.
They form part of the Hebrides, separated from the Scottish mainland and from the Inner Hebrides by the stormy stretch of water known as the Minch and the Little Minch. Most communities in the Outer Hebrides use the Scottish Gaelic language.
The name for the UK Parliament constituency covering this area is Na h-Eileanan an Iar, whilst the Scottish Parliament constituency for the area continues to be officially known as Western Isles although it is almost always written as Western Isles (Eilean Siar). The islands were known as Suðreyjar ("Southern Islands"; cf. Suðrland) under Norwegian rule for about 200 years until sovereignty was transferred to Scotland in the Treaty of Perth in 1266, which followed the Battle of Largs three years earlier. Colloquially, they are sometimes referred to collectively as An t-Eilean Fada or "The Long Island"; Na h-Eileanan a-Muigh (the Outer Isles) is also heard occasionally in Scottish Gaelic.