Acts of Union 1800
acts of the Parliament of Great Britain and the Parliament of Ireland which united the Kingdom of Great Britain and the Kingdom of Ireland to create the United Kingdom of Great Britain and Ireland
The Acts of Union 1800 (Irish: Achtanna an Aontais 1800) were parallel acts of the Parliament of Great Britain and the Parliament of Ireland which united the Kingdom of Great Britain and the Kingdom of Ireland (previously in personal union) to create the United Kingdom of Great Britain and Ireland. The acts came into force between 31 December 1800 and 1 January 1801, and the merged Parliament of the United Kingdom had its first meeting on 22 January 1801.
Provisions of the acts remain in force, with amendments and some Articles repealed, in the United Kingdom, but they have been repealed in their entirety in the Republic of Ireland.
Citation
Two acts were passed in 1800 with the same long title: An Act for the Union of Great Britain and Ireland. The short title of the act of the British Parliament is Union with Ireland Act 1800 (39 & 40 Geo. 3. c. 67), assigned by the Short Titles Act 1896. The short title of the act of the Irish Parliament is Act of Union (Ireland) 1800 (40 Geo. 3.
The public source identifies “Acts of Union 1800” as acts of the Parliament of Great Britain and the Parliament of Ireland which united the Kingdom of Great Britain and the Kingdom of Ireland to create the United Kingdom of Great Britain and Ireland. This brief keeps that definition visible, then builds a research path around Acts, Union and acts.
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Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Sep 7, 2026. The linked authority identifier is Q343100. The Library of Congress control number is sh85068015. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1800, 1801 and 1896.
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This entry incorporates text from “Acts of Union 1800” 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.