Sierra Leone is about 13 times smaller than Nigeria.

Nigeria is approximately 923,768 sq km, while Sierra Leone is approximately 71,740 sq km, making Sierra Leone 7.77% the size of Nigeria. Meanwhile, the population of Nigeria is ~225.1 million people (216.4 million fewer people live in Sierra Leone).
This to-scale comparison of Nigeria vs. Sierra Leone uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

Share this