Belfast–Dublin line
railway line between Belfast of Northern Ireland, United Kingdom and Dublin, capital of the Republic of Ireland
The Belfast–Dublin line, commonly known as the Dublin-Belfast Line or The Great Northern Main Line (or simply the "Dublin line" by NI Railways and the "Belfast line" by Iarnród Éireann), is a 112-mile (181 km) semi-electrified railway connecting Belfast Grand Central in Northern Ireland to Dublin Connolly in the Republic of Ireland. The key towns and cities of Skerries, Drogheda, Dundalk, Newry, Portadown, Lurgan, and Lisburn are situated along the line. The Belfast–Dublin line is the busiest railway route on the island of Ireland, carrying a mixture of intercity rail, regional rail, commuter rail traffic and freight traffic. It is uniquely significant as the only railway line that crosses the Republic of Ireland–United Kingdom border.
History
Early Development
The construction of the Belfast–Dublin line was undertaken by three separate railway companies:
Ulster Railway: Incorporated in by the Ulster Railway Act 1836, the Ulster Railway began construction in March 1837. By August 1839, It had completed the initial 7-mile stretch between Belfast Station (changing to Belfast Victoria Street, later renamed Belfast Great Victoria Street) and Lisburn. The line progressively extended to Lurgan 1841 and then Portadown by 1842 and further to Clones by 1863. Initially built to a broad gauge, the Ulster Railway later converted to the Irish standard gauge of 5 feet 3 inches to ensure compatibility with other lines.
Dublin and Drogheda Railway (D&D): Authorised by Dublin and Drogheda Railway Act 1836 & 1840 established the route between Dublin and Drogheda. Initially the line opened on 24 May 1844 from Drogheda to Dublin Royal Canal later changing to Dublin Station (Later Amiens street then Connolly) on the 29 November 1844.
This brief starts where responsible research should: with the source description of “Belfast–Dublin line” as railway line between Belfast of Northern Ireland, United Kingdom and Dublin, capital of the Republic of Ireland. Everything that follows is an evidence route, not borrowed authority.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q3743404. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1836, 1837, 1839 and 1841.
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This entry incorporates text from “Belfast–Dublin line” 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.