How Many Countries Constitute Great Britain?

Great Britain is not a country—it's an island. This is a common misconception.

The Geography

Great Britain = the largest island of the British Isles, containing three countries:

• England
• Scotland
• Wales

The Sovereign State

United Kingdom of Great Britain and Northern Ireland (UK) = the sovereign nation comprising:

• England
• Scotland
• Wales
• Northern Ireland

Key Distinction

Great Britain = geographic island (3 countries).
United Kingdom = political state (4 countries).

Northern Ireland is part of the UK but not part of Great Britain (it's on the island of Ireland).