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.