Act of Union, 1800

Union with Ireland Act 1800

Parliament of Great Britain
Citation	39 & 40 Geo. 3 c. 67
Territorial extent	Great Britain
Status: Current legislation
Revised text of statute as amended

Act of Union (Ireland) 1800

Parliament of Ireland
Citation	40 Geo. 3 c.38
Introduced by	John Toler
Territorial extent	Ireland
Other legislation
Repealed by	Statute Law Revision (Pre-Union Irish Statutes) Act, 1962 (Rep. I.)
Relates to	An Act to regulate the Mode by which the Lords Spiritual and Temporal, and the Commons, to serve in the Parliament of the United Kingdom on the Part of Ireland shall be summoned and returned to the said Parliament (40 Geo. 3 c.29)
Status: Current legislation
Revised text of statute as amended

The Acts of Union 1800 (sometimes erroneously referred to as a single Act of Union 1801) 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 with effect from 1 January 1801. Both Acts, though since amended, still remain in force in the United Kingdom, but have been repealed in the Republic of Ireland.

Two acts with the same long title, 'An Act for the Union of Great Britain and Ireland' were passed in 1800; the short title of the act of the Irish Parliament is 'Act of Union (Ireland) 1801', and that of the British Parliament is 'Union with Ireland Act 1801'.

Before these Acts, Ireland had been in personal union with England since 1541, when the Irish Parliament had passed the Crown of Ireland Act 1542, proclaiming King Henry VIII of England to be King of Ireland. Since the 12th century, the King of England had been technical overlord of the Lordship of Ireland, a papal possession. Both the Kingdoms of Ireland and England later came into personal union with that of Scotland upon the Union of the Crowns in 1603.

In 1707, the Kingdom of England and the Kingdom of Scotland were united into a single kingdom: the Kingdom of Great Britain. Upon that union, each House of the Parliament of Ireland passed a congratulatory address to Queen Anne, praying that, "May God put it in your royal heart to add greater strength and lustre to your crown, by a still more comprehensive Union". The Irish parliament at that time was subject to a number of restrictions that placed it subservient to the Parliament of England (and following the union of England and Scotland, the Parliament of Great Britain), however Ireland gained effective legislative independence from Great Britain through the Constitution of 1782.