What countries are the very lowest IQs?
Sub-Saharan African countries and Papua New Guinea.
The top 10 countries with the lowest average IQ scores, as of 2025, reflect significant socio-economic challenges. Nepal ranks the lowest with an average IQ of 42.99, followed by Liberia and Sierra Leone, both at 45.07. Guatemala has an average IQ of 47.72, while The Gambia scores 52.98.
world iq map.png