This is a list of the islands of Wales, the mainland of which is part of Great Britain, as well as a table of the largest Welsh islands by area.

Name	Island Group / Location
Anglesey	Irish Sea
Bardsey Island	Gwynedd
Barry Island	Bristol Channel (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 Island	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
Shell Island	Gwynedd
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 Bīg	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

References

See also

• List of islands of England
• List of islands of Scotland
• List of islands of Ireland
• List of the British Isles

cy:Rhestr ynysoedd Cymru de:Liste der Inseln von Wales fr:Liste des īles du pays de Galles