How many countries make up Great Britain?
This can be a tricky question because Great Britain is an island east of Ireland which is made up of 3 countries England Wales Scotland However the term Great Britain has been used unofficially to refer to the United Kingdom of Great Britain and Northern Ireland, which makes this unofficial title technically incorrect. This is because the United Kingdom of Great Britain and Northern Ireland comprises 4 countries and over 100 separate islands and island groups. These 4 countries are England Scotland Wales Republic of Northern Ireland So to answer your question correctly Great Britain is an island comprising the 3 countries England, Scotland and Wales, however the United Kingdom of Great Britain and Northern Ireland comprises the above 3 plus the Republic of Northern Ireland.
Great Britain is an island lying off the northwestern coast of mainland Europe and to the east of Ireland, comprising the main territory of the United Kingdom. Great Britain is also used as a geopolitical term describing the combination of England, Scotland, and Wales, which together comprise the entire island and some outlying islands. In everyday speech and non-official writing in all English-speaking and most other countries, “Great Britain”, and simply “Britain”, Geography With an area of 80,800 square miles (209,000 km²) the island of Great Britain is the largest of the British Isles.  It is the largest island in Europe, and eighth largest in the world.  It is the third most populous island after Java and Honshū.  Great Britain stretches over approximately ten degrees of latitude on its longer, north-south axis. Geographically, the island is marked by low, rolling countryside in the east and south, while hills and mountains predominate in the western and northern regions.
The 4 countries that make up the United Kingdom of Great Britain are England, Scotland, Wales, and Northern Ireland. Prior to 13th and 11th centuries these countries with the exception of Scotland were of several independant kingdoms each with their own ruler. For example present day England was 7 different countries: Northumbria, Mercia, East Anglia, Essex, Kent, Sussex, and Wessex.
3 ‘countries’ England, Scotland and Wales make up Great Britain. Thats the big island in the British Isles – which includes Ireland, the Isle of Man and all the other islands around the coast. Technically you could call someone from Ireland ‘British’ as they are from the British Isles, but that term is usually only used for those from Great Britain.
The answer is Zero! “Great Britain is no longer a country, but simply an island in the United Kingdom. Politically, “Great Britain” describes the combination of England, Scotland, and Wales, and therefore includes a number of outlying islands such as the Isle of Wight, Anglesey, the Isles of Scilly, the Hebrides, and the island groups of Orkney and Shetland, but does not include the Isle of Man or the Channel Islands.