The Minch (Scottish Gaelic: A' Mhaoil) is a strait in north-west Scotland that separates the mainland from Lewis and Harris in the Outer Hebrides. It was known as Skotlandsfjörð ("Scotland's firth") in Old Norse.
The Minch's southern extension, which separates Skye from the middle islands of the Hebridean chain, is known as the Little Minch. It opens into the Sea of the Hebrides.
The Sea of the Hebrides (Scottish Gaelic: An Cuan Barrach, pronounced [ən̪ˠ ˈkʰuan ˈparˠəx]) is a small and partly sheltered section of the North Atlantic Ocean, indirectly off the southern part of the north-west coast of Scotland. To the east are the mainland of Scotland and the northern Inner Hebrides (including Skye and the Small Isles); to the west are the southern Outer Hebrides islands, principally South Uist, Eriskay, and Barra. To the north is the Little Minch, a channel connecting it with the Minch.
The Sea of the Hebrides forms part of the Inner Seas off the West Coast of Scotland, as defined by the International Hydrographic Organization, and part of the Seas west of Scotland as far as fisheries management is concerned.
The Outer Hebrides (/ˈhɛbrɪdiːz/ HEB-rid-eez) or Western Isles (Scottish Gaelic: na h-Eileanan Siar [nə ˈhelanən ˈʃiəɾ] , na h-Eileanan an Iar [nə ˈhelanən əɲ ˈiəɾ] or na h-Innse Gall, 'Islands of the Strangers'), sometimes known as the Long Isle or Long Island (Scottish Gaelic: an t-Eilean Fada), is an island chain off the west coast of mainland Scotland. It is the longest archipelago in the British Isles. The islands form part of the archipelago 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. The Outer Hebrides are considered to be the traditional heartland of the Gaelic language. The islands form one of the 32 council areas of Scotland, which since 1998 has used only the Gaelic form of its name, including in English language contexts. The council area is called Na h-Eileanan an Iar ('the Western Isles') and its council is Comhairle nan Eilean Siar ('Council of the Western Isles').
Most of the islands have a bedrock formed from ancient metamorphic rocks, and the climate is mild and oceanic. The 19 inhabited islands had an estimated population of 26,020 in 2024, and there are more than 50 substantial uninhabited islands. The distance from Barra Head to the Butt of Lewis is roughly 210 kilometres (130 mi).