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List of longest placenames in Ireland

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 4, 2025
Entity authorityQ21013751 ↗
Source-derived summary

This is a list of the longest place names in Ireland. It includes names written in English as a single word of at least 20 letters. The vast majority of English-language place names in Ireland are anglicisations of Irish language names. The spelling which has legal force is usually that used by the Ordnance Survey of Ireland. Many of Ireland's longest place names are found in the far west of the island, where the Irish language has survived the longest; including Gaeltacht areas, where it is still the vernacular. These names are generally written as multiple words in Irish.

At 22 letters long, Muckanaghederdauhaulia (from Muiceanach idir Dhá Sháile meaning "pig-marsh between two saltwaters") is often believed to be Ireland's longest one-word place name. In Life: A User's Manual by Georges Perec, it is one of the ports visited and painted by the character Bartlebooth, who believes it to be the longest port name in the world. An 1830s boundary survey uses the spelling Mwickanaghedderauhaulia, which is 23 letters long.

However, the Placenames Database of Ireland (logainm.ie) records several other place names of at least 22 letters.

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The public source identifies “List of longest placenames in Ireland” as wikimedia list article. This brief keeps that definition visible, then builds a research path around List, longest and placenames.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current 187-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with List, longest and placenames providing the first useful test.
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This entry incorporates text from “List of longest placenames in Ireland” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.