Leinster
province in Ireland
Leinster ( LEN-stər; Irish: Laighin [ˈl̪ˠəinʲ] or Cúige Laighean [ˌkuːɟə ˈl̪ˠəinˠ]) is one of the four provinces of Ireland, in the east of the island.
The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century Norman invasion of Ireland, the historic "fifths" of Leinster and Meath gradually merged, mainly due to the impact of the Pale, which straddled both, thereby forming the present-day province of Leinster. The ancient kingdoms were shired into a number of counties for administrative and judicial purposes. In later centuries, local government legislation has prompted further sub-division of the historic counties.
Leinster has no official function for local-government purposes. However, it is an officially recognised subdivision of Ireland and is listed on ISO 3166-2 as one of the four provinces of Ireland. "IE-L" is attributed to Leinster as its country sub-division code. Leinster had a population of 2,858,501 according to the preliminary results of the 2022 census, making it the most populous province in the country. The traditional flag of Leinster features a golden harp on a green background.
The public source identifies “Leinster” as province in Ireland. This brief keeps that definition visible, then builds a research path around Leinster, province and Ireland.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Leinster”, the useful work is to connect “province in Ireland” to the records capable of establishing context and consequence.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q159736. Authority coordinates are 53.348, -6.260. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2022.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Leinster”, its source revision and the description used here.
- Expand the search: follow Leinster primary sources, Leinster archive and Leinster research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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This entry incorporates text from “Leinster” 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.