The Hebrides ( /ˈhɛbrɨdiːz/; Scottish Gaelic: Innse Gall) comprise a widespread and diverse archipelago off the west coast of Scotland. There are two main groups: the Inner and Outer Hebrides. These islands have a long history of occupation dating back to the Mesolithic and the culture of the residents has been affected by the successive influences of Celtic, Norse and English-speaking peoples. This diversity is reflected in the names given to the islands, which are derived from the languages that have been spoken there in historic and perhaps prehistoric times.

A variety of artists have been inspired by their Hebridean experiences. Today the economy of the islands is dependent on crofting, fishing, tourism, the oil industry and renewable energy. The Hebrides lack biodiversity in comparison to mainland Britain, but these islands have much to offer the naturalist. Seals, for example, are present around the coasts in internationally important numbers.

The Hebrides have a diverse geology ranging in age from Precambrian strata that are amongst the oldest rocks in Europe to Tertiary igneous intrusions.

Coordinates: 57°46′N 7°01′W / 57.76°N 7.02°W / 57.76; -7.02

The Outer Hebrides (Scottish Gaelic: Na h-Eileanan Siar, IPA: [nə ˈhelanən ˈʃiəɾ]) also known as the Western Isles and the Long Island, is an island chain off the west coast of Scotland. The islands are geographically contiguous with Comhairle nan Eilean Siar, one of the 32 unitary council areas of Scotland. They form part of the Hebrides, separated from the Scottish mainland and from the Inner Hebrides by the waters of the Minch, the Little Minch and the Sea of the Hebrides. Scottish Gaelic is the predominant spoken language, although in a few areas English speakers form a majority.

Most of the islands have a bedrock formed from ancient metamorphic rocks and the climate is mild and oceanic. The 15 inhabited islands have a total population of about 26,500 and there are more than 50 substantial uninhabited islands. From Barra Head to the Butt of Lewis is roughly 210 kilometres (130 mi).

There are various important prehistoric structures, many of which pre-date the first written references to the islands by Roman and Greek authors. The Western Isles became part of the Norse kingdom of the Suðreyjar, which lasted for over 400 years until sovereignty was transferred to Scotland by the Treaty of Perth in 1266. Control of the islands was then held by clan chiefs, principal of whom were the MacLeods, MacDonalds, Mackenzies and MacNeils. The Highland Clearances of the 19th century had a devastating effect on many communities and it is only in recent years that population levels have ceased to decline. Much of the land is now under local control and commercial activity is based on tourism, crofting, fishing, and weaving.