Shetland, also called the Shetland Islands and formerly Zetland, is a subarctic archipelago in Scotland lying between Orkney, the Faroe Islands, and Norway. It is the northernmost region of the United Kingdom.

The islands lie about 80 km (50 mi) to the northeast of Orkney, 170 km (110 mi) from mainland Scotland and 220 km (140 mi) west of Norway. They form part of the border between the Atlantic Ocean to the west and the North Sea to the east. Their total area is 1,466 km² (566 sq mi), and the population totalled 22,920 in 2019. The islands comprise the Shetland constituency of the Scottish Parliament. The local authority, the Shetland Islands Council, is one of the 32 council areas of Scotland. The islands' administrative centre and only burgh is Lerwick, which has been the capital of Shetland since 1708, before which time the capital was Scalloway.

The archipelago has an oceanic climate, complex geology, rugged coastline, and many low, rolling hills. The largest island, known as "the Mainland", has an area of 967 km² (373 sq mi), and is the fifth-largest island in the British Isles. It is one of 16 inhabited islands in Shetland.

Humans have lived in Shetland since the Mesolithic period. Picts are known to have been the original inhabitants of the islands, before the Norse conquest and subsequent colonisation in the Early Middle Ages. During the 10th to 15th centuries, the islands formed part of the Kingdom of Norway until they were annexed into the Kingdom of Scotland due to a royal dispute involving the payment of a dowry. In 1707, when Scotland and England united to form the Kingdom of Great Britain, trade between Shetland and continental Northern Europe decreased. The discovery of North Sea oil in the 1970s significantly boosted Shetland's economy, employment and public-sector revenues. Fishing has always been an important part of the islands’ economy.

The local way of life reflects the Norse heritage of the isles, including the Up Helly Aa fire festivals and a strong musical tradition, especially the traditional fiddle style. Almost all place names in the islands also have Norse origin. The islands have produced a variety of prose writers and poets, who have often written in the distinctive Shetland dialect. Numerous areas on the islands have been set aside to protect the local fauna and flora, including a number of important seabird nesting sites. The Shetland pony and Shetland Sheepdog are two well-known Shetland animal breeds. Other animals with local breeds include the Shetland sheep, cow, goose, and duck. The Shetland pig, or grice, has been extinct since about 1930.

The islands' motto, which appears on the Council's coat of arms, is "Með lögum skal land byggja" (“By law shall the land be built"). The phrase is of Old Norse origin, is mentioned in Njáls saga, and was likely borrowed from provincial Norwegian laws such as the Frostathing Law.