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United Kingdom

Also Known As United Kingdom of Great Britain and Northern Ireland
Northern Europe

The United Kingdom occupies most of the British Isles off the northwest coast of continental Europe, comprising Great Britain, England, Scotland and Wales, together with Northern Ireland on the island of Ireland. The 1707 Acts of Union joined the Kingdoms of England and Scotland into the Kingdom of Great Britain; a further Act of Union in 1801 joined Great Britain with the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland. Most of Ireland left the union after the Irish War of Independence, and the 1922 settlement fixed the present territorial form, the United Kingdom of Great Britain and Northern Ireland. Its capital, London, sits on the River Thames in southeastern England.

Facts
Capital
London 2
Population
69,414,000 2
Britannica 2025 estimate.
Population Estimate Year
2025 2
Area (sq km)
242,500 2
Independence or Founding Year
1801 2
1801 legislation joined Great Britain (itself formed by the 1707 union of England and Scotland) with Ireland to create the United Kingdom of Great Britain and Ireland. The present territorial form, the United Kingdom of Great Britain and Northern Ireland, dates from 1922, after most of Ireland left the union; 1801 is recorded here as the founding of the United Kingdom as a state, with the 1707 and 1922 milestones kept in this note.
Classification
Sovereignty Status
UN Member State 1
Learn More
Three Unions

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

The United Kingdom this atlas records today is the product of three separate acts of union, each changing what the word Britain actually meant. The first, in 1707, joined the once-independent Kingdoms of England and Scotland, which had shared a monarch since 1603 but kept separate parliaments until the Acts of Union dissolved both and created a single Parliament of Great Britain at Westminster. The second, in 1801, joined that Kingdom of Great Britain with the Kingdom of Ireland, forming the United Kingdom of Great Britain and Ireland, a state that governed the whole of the British Isles as a single political unit for over a century. The third came in 1922, not an addition but a subtraction: after the Irish War of Independence, the Anglo-Irish Treaty let the southern twenty-six counties leave as the Irish Free State, while six northern counties remained inside the union as Northern Ireland, fixing the territory in its present form. The state kept the name United Kingdom of Great Britain and Ireland for five more years afterward; only the Royal and Parliamentary Titles Act, receiving royal assent on 12 April 1927, renamed it the United Kingdom of Great Britain and Northern Ireland. This atlas dates the United Kingdom's own founding to 1801, the year the name itself was first used for a single state, while carrying the 1707 union, the 1922 partition and the 1927 renaming in the same fact rather than picking one to represent all three.

Four Nations, One State

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

England, Scotland, Wales and Northern Ireland are each, in ordinary usage, called a country, and the United Kingdom is the single sovereign state that contains all four of them at once, a structure that confuses almost everyone who did not grow up inside it. England has no devolved parliament of its own, governed directly from Westminster; Scotland, Wales and Northern Ireland each have their own devolved legislature, with varying powers over health, education and other domestic policy, won gradually since the late 1990s rather than granted at the country's 1801 or 1922 founding. A resident of Cardiff or Edinburgh genuinely has two governments, a devolved one and the UK one in London, answerable for different things, which is part of why questions of independence, Scottish most prominently, keep recurring inside a union old enough that most of its citizens have never known anything else. London sits at the center of all of it: the seat of the UK Parliament and the Crown, but not, formally, the seat of an English parliament that does not exist.

United Kingdom

Cities

Aberdeen

United Kingdom

Alchester

United Kingdom

Ancaster (Roman town)

United Kingdom

Aquae Arnemetiae

United Kingdom

Armagh

United Kingdom

Bangor, Gwynedd

United Kingdom

Belfast

United Kingdom

Berwick-upon-Tweed

United Kingdom

Birmingham

United Kingdom

Bradford

United Kingdom

Bristol

United Kingdom

Caernarfon

United Kingdom

Cambridge

United Kingdom

Cardiff

United Kingdom

Carlisle

United Kingdom

Chelmsford

United Kingdom

Chester

United Kingdom

City of London

United Kingdom

City of Westminster

United Kingdom

Clausentum

United Kingdom

Conwy

United Kingdom

Coria (Corbridge)

United Kingdom

Coventry

United Kingdom

Cunetio

United Kingdom

Derby

United Kingdom

Derry

United Kingdom

Doncaster

United Kingdom

Dundee

United Kingdom

Dunfermline

United Kingdom

Duroliponte

United Kingdom

Eboracum

United Kingdom

Edinburgh

United Kingdom

Ely, Cambridgeshire

United Kingdom

Exeter

United Kingdom

Glasgow

United Kingdom

Gloucester

United Kingdom

Gobannium

United Kingdom

Hereford

United Kingdom

Inverness

United Kingdom

Isca Dumnoniorum

United Kingdom

Kingston upon Hull

United Kingdom

Lancaster, Lancashire

United Kingdom

Leeds

United Kingdom

Leicester

United Kingdom

Liverpool

United Kingdom

Londinium

United Kingdom

London

United Kingdom

Magnis (Kenchester)

United Kingdom

Manchester

United Kingdom

Milton Keynes

United Kingdom

Newport, Wales

United Kingdom

Newry

United Kingdom

Norwich

United Kingdom

Nottingham

United Kingdom

Noviomagus Reginorum

United Kingdom

Oxford

United Kingdom

Peterborough

United Kingdom

Plymouth

United Kingdom

Portsmouth

United Kingdom

Salford

United Kingdom

Salisbury

United Kingdom

Sheffield

United Kingdom

Southampton

United Kingdom

Southend-on-Sea

United Kingdom

St Albans

United Kingdom

Stirling

United Kingdom

Stoke-on-Trent

United Kingdom

Sunderland

United Kingdom

Swansea

United Kingdom

Truro

United Kingdom

Venta Belgarum

United Kingdom

Venta Icenorum

United Kingdom

Wells, Somerset

United Kingdom

Winchester

United Kingdom

Wolverhampton

United Kingdom

York

United Kingdom
Connections

Associated With

Birmingham, Cities
Source Birmingham (Wikipedia)
Bristol, Cities

Cairngorms National Park is the largest national park in the United Kingdom.

Source Cairngorms National Park (Wikipedia)
Cambridge, Cities
Source Cambridge (Wikipedia)
Edinburgh, Cities
Source Edinburgh (Wikipedia)
England, States or Territories

England is a constituent country of United Kingdom.

Source England (Wikipedia)

The Giant's Causeway is in County Antrim, Northern Ireland, United Kingdom.

Source Giant's Causeway (Wikipedia)
Glasgow, Cities
Source Glasgow (Wikipedia)
Leeds, Cities
Source Leeds (Wikipedia)
Liverpool, Cities
London, Cities

London is the capital and largest city of the United Kingdom.

Source Encyclopaedia Britannica
London, Cities
Source London (Wikipedia)
Manchester, Cities
Source Manchester (Wikipedia)
North Sea, Bodies of Water

The United Kingdom is one of the states bordering the North Sea.

Source Encyclopaedia Britannica
Oxford, Cities
Source Oxford (Wikipedia)
River Thames, Bodies of Water

The River Thames runs entirely in England, reaching London before emptying into the North Sea.

Source Encyclopaedia Britannica
Scotland, States or Territories

Scotland is a constituent country of United Kingdom.

Source Scotland (Wikipedia)
Sheffield, Cities

Snowdonia is a national park in North Wales, United Kingdom.

Source Snowdonia National Park (Wikipedia)

The United Kingdom governs most of the British Isles.

Source British Isles (Wikipedia)

Bordered By Water

Source North Sea (Wikipedia)

Has Capital

London, Cities

London is the capital of the United Kingdom.

Source London (Wikipedia)

Long-Form Articles

Rivers Through Territory

Source River Thames (Wikipedia)
In the Other Atlases
Sources
1. Member States of the United Nations (Wikipedia)
Wikimedia FoundationIntroduction
Quote, Introduction
The United Nations comprise 193 sovereign states and the world's largest intergovernmental organization.
View the Source
2. Encyclopaedia Britannica
Encyclopaedia Britannica, Inc.
  • United Kingdom: History, Population, Map, Flag, Capital, and Facts
  • On Continent: Europe
  • Associated With: London
  • Associated With: River Thames
  • Associated With: North Sea
View the Source
London (Wikipedia)
Wikimedia Foundation
  • Associated With: London, Infobox
    Sovereign state: United Kingdom
  • Has Capital: London, Lead section, capital fact
    London is the capital and largest city of England and the United Kingdom, with a population of 9.14 million people in 2025.
View the Source
River Thames (Wikipedia)
Wikimedia FoundationRivers Through Territory: River Thames, Infobox, Location field
Quote, Rivers Through Territory: River Thames, Infobox, Location field
England
View the Source
North Sea (Wikipedia)
Wikimedia FoundationBordered By Water: North Sea, Infobox/lead, bordering countries
Quote, Bordered By Water: North Sea, Infobox/lead, bordering countries
the United Kingdom, Norway, Denmark, Germany, the Netherlands, Belgium, and France
View the Source
Manchester (Wikipedia)
Wikimedia FoundationAssociated With: Manchester, Infobox, Country
Quote, Associated With: Manchester, Infobox, Country
United Kingdom
View the Source
Birmingham (Wikipedia)
Wikimedia FoundationAssociated With: Birmingham, Infobox, Country
Quote, Associated With: Birmingham, Infobox, Country
United Kingdom
View the Source
Glasgow (Wikipedia)
Wikimedia FoundationAssociated With: Glasgow, Infobox, Country
Quote, Associated With: Glasgow, Infobox, Country
United Kingdom
View the Source
Cambridge (Wikipedia)
Wikimedia FoundationAssociated With: Cambridge, Infobox, Sovereign state
Quote, Associated With: Cambridge, Infobox, Sovereign state
United Kingdom
View the Source
Edinburgh (Wikipedia)
Wikimedia FoundationAssociated With: Edinburgh, Infobox, Sovereign state
Quote, Associated With: Edinburgh, Infobox, Sovereign state
United Kingdom
View the Source
Oxford (Wikipedia)
Wikimedia FoundationAssociated With: Oxford, Infobox, Sovereign state
Quote, Associated With: Oxford, Infobox, Sovereign state
United Kingdom
View the Source
Leeds (Wikipedia)
Wikimedia FoundationAssociated With: Leeds, Infobox, Country
Quote, Associated With: Leeds, Infobox, Country
United Kingdom
View the Source
British Isles (Wikipedia)
Wikimedia FoundationAssociated With: The British Isles, Lead section
Quote, Associated With: The British Isles, Lead section
United Kingdom of Great Britain and Northern Ireland
View the Source
Cairngorms National Park (Wikipedia)
Wikimedia FoundationAssociated With: Cairngorms National Park, Lead section
Quote, Associated With: Cairngorms National Park, Lead section
already the largest national park in the United Kingdom
View the Source
Snowdonia National Park (Wikipedia)
Wikimedia FoundationAssociated With: Snowdonia National Park, Geographic information box
Quote, Associated With: Snowdonia National Park, Geographic information box
Wales, United Kingdom
View the Source
Giant's Causeway (Wikipedia)
Wikimedia FoundationAssociated With: Giant's Causeway, Lead section
Quote, Associated With: Giant's Causeway, Lead section
It is located in County Antrim on the north coast of Northern Ireland.
View the Source

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