Isle of Anglesey (Ynys Môn)

Unitary authority in Wales

Coordinates:	53.29, -4.36
OS grid ref:	SH 42 79

The Isle of Anglesey unitary authority in Wales sits off the north‑west coast, separated from the mainland by the Menai Strait. It is the largest island in Wales and is prized for a dramatic coastline of sandy bays, sea cliffs and headlands; the Anglesey Coastal Path gives expansive views across to Snowdonia. Principal towns include Holyhead (the main ferry port to Ireland), Llangefni, Amlwch and Beaumaris, and the island’s history ranges from the Neolithic tomb of Bryn Celli Ddu and the copper workings at Parys Mountain to the medieval Beaumaris Castle and the 19th‑century bridges at Menai Bridge.

Today Anglesey’s economy mixes agriculture, tourism and transport, with energy projects such as the former nuclear site at Wylfa and interest in offshore renewables contributing to local debate. Wildlife and conservation are important - places like South Stack, the dunes at Newborough Sands and the tidal island of Llanddwyn draw birdwatchers and seal or dolphin sightings - and a strong Welsh identity (the island is often called Ynys Môn) sustains vibrant local culture, language and community events.

Isle of Anglesey postcode districts

LL58, LL59, LL60, LL61, LL62, LL63, LL64, LL65, LL66, LL67, LL68, LL69, LL70, LL71, LL72, LL73, LL74, LL75, LL76, LL77, LL78

Most populated places in Isle of Anglesey

Places in Isle of Anglesey

Aberffraw Parish
Aethwy Ward
Amlwch Built-up area
Beaumaris Built-up area
Benllech Built-up area
Bodedern Built-up area
Bodffordd Parish
Bodorgan Parish
Bodowyr Ward
Bro Aberffraw Ward
Bro'r Llynnoedd Ward
Bryngwran Built-up area
Brynsiencyn Built-up area
Bull Bay Built-up area
Caergeiliog Built-up area
Dwyran Built-up area
Gaerwen Built-up area
Gwalchmai Built-up area
Holyhead Built-up area
Llanddona Built-up area
Llanerchymedd Built-up area
Llanfechell Built-up area
Llangefni Built-up area
Llangoed Built-up area
Llangristiolus Built-up area
Malltraeth Built-up area
Menai Bridge Built-up area
Moelfre Built-up area
Pentraeth Built-up area
Penysarn Built-up area
Rhosneigr Built-up area
Valley Built-up area