United Kingdom of Great Britain and Northern Ireland is a country in Northern Europe, Europe. In 2025 it has about 69.6 million people (UN estimate), the 22nd most people of the 193 UN member states.
UN member since 1945Population: 22nd
United Kingdom of Great Britain and Northern Ireland英国
Region
Northern Europe, Europe
Population
about 69.6 million (22nd)
Area
244,376 km² (77th)
UN member since
October 24, 1945
Ranks are among the 193 UN member states, from most people and from largest area.
United Kingdom of Great Britain and Northern Ireland in numbers
In 2025 the population is about 69.6 million, the 22nd most people of the 193 UN member states. That is about 1/1 of Japan’s (about 123 million).
The area is 244,376 km², the 77th largest of the 193. That is about 1/1 of Japan’s area.
If we work out the number of people per square kilometer (population density), it is about 285.
Joining the United Nations
United Kingdom of Great Britain and Northern Ireland joined the United Nations on October 24, 1945.
It was a member before Japan joined in 1956.
26 other countries joined on the same day.
Think about it
Q1Compare United Kingdom of Great Britain and Northern Ireland’s population rank and area rank. What do you notice?
Q2Find United Kingdom of Great Britain and Northern Ireland on a map or globe. Which countries are around it?
Q3Choose one thing you want to know more about United Kingdom of Great Britain and Northern Ireland, and look it up.
There is no single right answer. Talking it over with someone at home is a good way to learn.
Did you know? — There are 10 UN member states in Northern Europe. The one with the most people is United Kingdom of Great Britain and Northern Ireland.