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List of islands of Wales: Wikis


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This is a list of islands of Wales, the mainland of which is part of Great Britain, as well as a table of the largest Welsh islands by area. The list includes tidal islands such as Sully Island but not locations such as Shell Island which, though they are termed islands, are in fact peninsulas.

Name Island Group / Location
Anglesey Irish Sea
Bardsey Island Gwynedd
Barry Island Vale of Glamorgan (linked to the mainland during the 1880s)
Caldey Island Pembrokeshire
Cardigan Island Ceredigion
Church Island Anglesey
Cribinau the church in the sea Anglesey
East Mouse Anglesey
Flat Holm Bristol Channel
Gateholm Pembrokeshire
Grassholm Pembrokeshire
Holy Island, Anglesey Anglesey
Midland Isle Pembrokeshire
Middle Mouse Anglesey
North Stack Anglesey
Puffin Island Anglesey
Ramsey Island Pembrokeshire
St Catherine's Island Pembrokeshire
St Margaret's Island Pembrokeshire
St Tudwal's Island East St Tudwal's Islands
St Tudwal's Island West St Tudwal's Islands
Salt Island Anglesey
Sheep Island Pembrokeshire
The Skerries Anglesey
Skokholm Island Pembrokeshire
Skomer Island Pembrokeshire
South Stack Anglesey
Sully Island Vale of Glamorgan
Thorn Island Pembrokeshire[1]
Tusker Rock Vale of Glamorgan
West Mouse Anglesey
Ynys Bery Pembrokeshire
Ynys Cantwr Pembrokeshire
Ynys Castell Anglesey
Ynys Dulas Anglesey
Ynys Eilun and Pont yr Eilun Pembrokeshire
Ynys Faelog Anglesey
Ynys Feurig Anglesey
Ynys Gaint Anglesey
Ynys Gored Goch Anglesey
Ynys Gwelltog Pembrokeshire
Ynys Llanddwyn Anglesey
Ynys Lochtyn Ceredigion
Ynys Moelfre Anglesey
Ynys Weiliog Anglesey
Ynys y Bîg Anglesey

Largest islands in Wales

Island Area (sq mi) Area (km²)
1 Anglesey 275.60 713.80
2 Holy Island 15.22 39.44
3 Skomer Island 1.12 2.90
4 Ramsey Island 0.99 2.58
5 Caldey Island 0.84 2.18
6 Bardsey Island 0.76 1.99
7 Skokholm 0.41 1.06
8 Flat Holm 0.13 0.33
9 Puffin Island 0.11 0.28
10 Cardigan Island 0.06 0.15


  1. ^ Mystery buyer for island, 27 July 1999, BBC, accessed 31 August 2008

See also



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