Wales

Caldey Island

Caldey Island (Welsh: Ynys Bŷr) is a small island near Tenby, Pembrokeshire, Wales, less than 1 mile (1.6 km) off the coast. With a recorded history going back over 1,500 years, it is one of the holy islands of Britain.

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Typesea island
Area1.8246 km²
Population40
Location51.63659, -4.69207
Highest point56.0 m

Part of the Wales islands map.

Names

Welsh: Ynys Bŷr; French: île de Caldey

Geology

Bedrock: Dinantian Rocks (Undifferentiated) (Limestone With Subordinate Sandstone And Argillaceous Rocks), Dinantian–Dinantian. Contains British Geological Survey materials © UKRI 2026, licensed under the BGS Open Data Licence (OGL v3.0). Source: BGS DigMapGB-625 Bedrock & Superficial WMS.

Nearby and related islands

Anglesey (Ynys Môn)
Bardsey Island
Holy Island
Salt Island
Skokholm
Skomer
Barry Island
Birnbeck Island

Sources

Wikidata · Q490810 · CC0

Last reviewed: 2026-08-13.