Sao Tome and Principe is a country in Middle Africa, Africa. In 2025 it has about 240,300 people (UN estimate), the 174th most people of the 193 UN member states.
UN member since 1975Population: 174th
Sao Tome and Principeサントメ・プリンシペ
Region
Middle Africa, Africa
Population
about 240,300 (174th)
Area
964 km² (168th)
UN member since
September 16, 1975
Ranks are among the 193 UN member states, from most people and from largest area.
Sao Tome and Principe in numbers
In 2025 the population is about 240,300, the 174th most people of the 193 UN member states. That is about 1/510 of Japan’s (about 123 million).
The area is 964 km², the 168th largest of the 193. That is about 1/390 of Japan’s area.
If we work out the number of people per square kilometer (population density), it is about 249.
Joining the United Nations
Sao Tome and Principe joined the United Nations on September 16, 1975.
That was 19 years after Japan joined in 1956.
Countries that joined on the same day: Cabo Verde, Mozambique.
Think about it
Q1Compare Sao Tome and Principe’s population rank and area rank. What do you notice?
Q2Find Sao Tome and Principe on a map or globe. Which countries are around it?
Q3Choose one thing you want to know more about Sao Tome and Principe, 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 9 UN member states in Middle Africa. The one with the most people is Democratic Republic of the Congo.