South Sudan is a country in Eastern Africa, Africa. In 2025 it has about 12.2 million people (UN estimate), the 80th most people of the 193 UN member states.
UN member since 2011Population: 80th
South Sudan南スーダン
Region
Eastern Africa, Africa
Population
about 12.2 million (80th)
Area
658,841 km² (39th)
UN member since
July 14, 2011
Ranks are among the 193 UN member states, from most people and from largest area.
South Sudan in numbers
In 2025 the population is about 12.2 million, the 80th most people of the 193 UN member states. That is about 1/10 of Japan’s (about 123 million).
The area is 658,841 km², the 39th largest of the 193. That is about 1.7 times Japan’s area.
If we work out the number of people per square kilometer (population density), it is about 19.
Joining the United Nations
South Sudan joined the United Nations on July 14, 2011.
That was 55 years after Japan joined in 1956.
Think about it
Q1Compare South Sudan’s population rank and area rank. What do you notice?
Q2Find South Sudan on a map or globe. Which countries are around it?
Q3Choose one thing you want to know more about South Sudan, 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 18 UN member states in Eastern Africa. The one with the most people is Ethiopia.