How many islands are there in the UK?

How many islands are there in the UK?

The UK is made up of thousands of islands, all varying in size, geography and habitation – indeed, there are so many that counting the exact number can be a tricky business.

Published: April 9, 2025 at 10:21 am

The UK’s diverse and extensive island network is a vital part of its geography and culture. Many are famous for their historical significance, biodiversity and tourism appeal. Some are entirely uninhabited, serving as nature reserves or military bases.

How many islands are there in the UK?

While the exact number of UK islands fluctuates based on the definition of an island (e.g. does the number include tidal islands or those connected at low tide?), most estimates say the UK is home to between 4,400 and 6,000 islands, varying in size, geography and habitation.

The main island of Great Britain (which includes England, Scotland and Wales) is the largest island in the UK.

UK map
Map showing the islands that make up the UK. Credit: Getty

How many UK islands are inhabited?

It is believed that around 188 islands in the UK are permanently inhabited.

Scottish islands

Scotland has the most number of islands out of any country in the UK, including the well-known Hebrides, Orkney, and Shetland archipelagos.

According to a Scottish Government report from 2023, Scotland has 93 inhabited islands, including Skye, Mull and Lewis and Harris. There are many more that remain remote and uninhabited.

English islands

In England, notable islands including the Isle of Wight, the Isles of Scilly and Lindisfarne.

The Isle of Wight, just off the south coast, is the largest island in England, while the Isles of Scilly, a small, beautiful archipelago off the south-west coast of Cornwall, is known for its subtropical climate and unique flora.

Welsh islands

Wales has some islands as well, including Anglesey, which is the largest in the Irish Sea, as well as Bardsey Island and Skomer Island, both known for their wildlife.

Northern Irish islands

Northern Ireland also has several islands, such as Rathlin Island, off the north coast, which is the only inhabited offshore island in Northern Ireland.

Aerial view of a rugged island
The island of Skomer in Wales is known for its seabirds. Credit: Getty

What's the difference between the UK and the British Isles?

The UK (United Kingdom) made up of England, Scotland, Wales, and Northern Ireland. The British Isles is a geographical term that includes Great Britain, Ireland (both Northern Ireland and the Republic of Ireland), and surrounding smaller islands. So, the UK is part of the British Isles.

Learn more about the UK countryside

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