Ireland's UNESCO World Heritage Sites — and the Four on the Tentative List

On the World Heritage List

Brú na Bóinne — the Archaeological Ensemble of the Bend of the Boyne · County Meath · listed 1993 · criteria i, iii, iv (cultural)
A complex of Neolithic chamber tombs, standing stones, henges and enclosures, some from the 35th to 32nd centuries BC, with Newgrange at its heart. It holds the largest concentration of prehistoric megalithic art in Europe. Wikipedia ↗ · on this site
Sceilg Mhichíl — Skellig Michael · County Kerry · listed 1996 · criteria iii, iv (cultural)
A monastery near the summit of a pyramid of rock in the Atlantic, probably founded in the 7th century and a centre of monastic life for some 600 years. Its beehive huts, or clocháns, perched above sheer cliffs, show the austere life of the early Irish monks, and its remoteness has kept it exceptionally well preserved. Wikipedia ↗
The Giant's Causeway and Causeway Coast · County Antrim · listed 1986 · criteria natural
The basalt columns of the north Antrim coast, in Northern Ireland, inscribed on the United Kingdom's list. Wikipedia ↗
Gracehill Moravian settlement · County Antrim · criteria cultural
The Moravian village near Ballymena, founded in 1765, in Northern Ireland and part of the United Kingdom's listings. Wikipedia ↗

The tentative list

The Royal Sites of Ireland — Cashel, Dún Ailinne, the Hill of Uisneach, Rathcroghan and Tara · several counties · added 2010
Places of royal inauguration, ceremony and assembly for the provinces, with monuments from the Neolithic to the early Christian period; Navan Fort in Armagh can be seen as one of the same group. on this site
The Passage Tomb Landscape of County Sligo · Sligo · added 2023
A northern coastal group of passage tombs around Carrowmore and the Cúil Irra peninsula and a southern inland group at Carrowkeel in the Bricklieve Mountains, 23 km apart and linked by the Unshin River. on this site
Transatlantic Cable Ensemble (with Heart's Content, Newfoundland) · Kerry · added 2023
The two ends of the world's first permanent transatlantic telegraph cable: the Valentia cable station, built in 1868, and Heart's Content in Newfoundland, both closed in the 1960s with much original equipment still in place.
The Historic Astronomical Observatories of Ireland · Dublin and Offaly · added 2025
Birr Castle demesne and Dunsink Observatory, with Armagh Observatory in Northern Ireland planned as a third part, reflecting 18th- and 19th-century telescope and observatory design. on this site

Quick answers

How many UNESCO World Heritage Sites are in Ireland?

Two in the Republic, Brú na Bóinne (1993) and Sceilg Mhichíl (1996), and two in Northern Ireland, the Giant's Causeway and Gracehill. The Republic has four more on its tentative list.

What is on Ireland's tentative list?

The Royal Sites of Ireland (2010), the Passage Tomb Landscape of County Sligo (2023), the Transatlantic Cable Ensemble at Valentia (2023) and the Historic Astronomical Observatories at Birr and Dunsink (2025).

Source

Wikipedia's List of World Heritage Sites in Ireland ↗, which follows UNESCO's own listings; the descriptions are drawn from it. The Northern Ireland sites are listed under the United Kingdom.

Ireland's World Heritage Sites