Which Scottish archipelago has Stornoway as its largest settlement?

The Scottish archipelago whose largest settlement is Stornoway is the Outer Hebrides.

The Outer Hebrides, also called the Western Isles, form a long chain off Scotland's west coast. Stornoway, on the Isle of Lewis, is the archipelago's largest settlement and an important port, administrative centre, and transport hub.

The islands are separated from mainland Scotland and the Inner Hebrides by the Minch, the Little Minch, and the Sea of the Hebrides. The chain includes Lewis and Harris, the Uists, Benbecula, Barra, and many smaller islands. Causeways link several southern islands, while ferries remain essential for travel and commerce.

Stornoway can cause a second mix-up: it is a town, not the name of the archipelago or its largest island. The Outer Hebrides are also strongly associated with Scottish Gaelic, crofting, fishing, distinctive machair grasslands, and ancient Lewisian gneiss bedrock.