State

United Kingdom of Great Britain and Ireland

1801–1922 · 19th century

The United Kingdom of Great Britain and Ireland was the state created on 1 January 1801 by the Acts of Union, which merged the Kingdom of Great Britain and the Kingdom of Ireland under one parliament at Westminster. It ruled the largest empire of the 19th century. After the Irish War of Independence the Irish Free State left in December 1922, and the remaining state became the United Kingdom of Great Britain and Northern Ireland.

United Kingdom of Great Britain and Ireland
Image: Original: Acts of Union 1800 Vector: Yaddah · Public domain · Wikimedia Commons

Mentioned in 4 profiles

Kingdom of IrelandDecline, SummaryKingdom of Great BritainDecline, SummaryUnited Kingdom of Great Britain and IrelandFoundation, SummaryUnited KingdomFoundation, Summary

See also

Cite this entry
APA
The Epoch Institute. (2026). United Kingdom of Great Britain and Ireland. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/united-kingdom-of-great-britain-and-ireland
MLA
“United Kingdom of Great Britain and Ireland.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/united-kingdom-of-great-britain-and-ireland. Accessed .
Chicago
The Epoch Institute. “United Kingdom of Great Britain and Ireland.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/united-kingdom-of-great-britain-and-ireland.
Harvard
The Epoch Institute (2026) ‘United Kingdom of Great Britain and Ireland’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/united-kingdom-of-great-britain-and-ireland (Accessed: ).

Last reviewed October 2026Random entry ↻