Shetland (until 1975 spelled Zetland), also called the Shetland Islands, is an archipelago in Scotland lying between Orkney, the Faroe Islands, and Norway, marking the northernmost region of the United Kingdom. The islands lie about 50 miles (80 kilometres) to the northeast of Orkney, 110 mi (170 km) from mainland Scotland and 140 mi (220 km) west of Norway. They form part of the border between the Atlantic Ocean to the west and the North Sea to the east. The island's area is 1,467 km² (566 sq mi) and the population totalled 22,986 in 2022. The islands comprise the Shetland constituency of the Scottish Parliament. The islands' administrative centre, largest settlement and only burgh is Lerwick, which has been the capital of Shetland since 1708, before which time the capital was Scalloway. Due to its location it is accessible only by ferry or flight with an airport located in Sumburgh as well as a port and emergency airstrip in Lerwick.

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 373 sq mi (967 km²), and is the fifth-largest island in the British Isles. It is one of 16 inhabited islands in Shetland.