Government of Ireland Act 1920

A British law that partitioned Ireland for purposes of devolved government, establishing separate parliaments for Northern Ireland and Southern Ireland while keeping both within the United Kingdom.

Northern Ireland Parliament: The devolved legislature established by the Government of Ireland Act 1920 for Northern Ireland. The Act created this parliament, which operated from 1921 until its abolition in 1972.
Irish Home Rule movement: A political campaign for an Irish legislature with authority over domestic affairs while Ireland remained in the United Kingdom. The Act was a British attempt to resolve the Home Rule conflict by creating two devolved legislatures.
Partition of Ireland: The division of Ireland into Northern Ireland and the territory that became the Irish Free State. The Act supplied the constitutional framework for partition, though the later settlement changed its southern arrangements.
Government of Ireland Act 1949: A British law recognizing that Ireland had ceased to be part of the United Kingdom and addressing Northern Ireland’s constitutional position. Unlike the 1920 Act’s two-parliament plan, this law addressed a divided Ireland after the Irish Free State became a republic.
Irish reunification: The proposed political unification of Northern Ireland and the Republic of Ireland. The partition framework established by the Act remains central to debates about reunification.
Parliament of Southern Ireland: The legislature established by the Government of Ireland Act 1920 for Southern Ireland, which met only briefly. The Act provided for this counterpart, but it never developed into a functioning legislature.
Third Home Rule Bill: The 1912 bill that proposed a single Irish parliament within the United Kingdom. Its suspension during the First World War left Irish self-government unresolved when the 1920 Act was drafted.
Government of Ireland Act 1920 elections in Northern Ireland: The 1921 election that established Northern Ireland’s first parliament under the Act. The election produced the political institutions the Act designed for the six-county jurisdiction.
Ireland Act 1949: A British law recognizing that the Republic of Ireland was no longer part of the United Kingdom. It reflects the constitutional outcome that superseded the Act’s proposed Southern Ireland legislature.
Northern Ireland border poll: A referendum on whether Northern Ireland should remain in the United Kingdom or join a united Ireland. The Act’s division created the constitutional question a border poll would put to voters.

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