Updated National IQ estimates (2025):

- Five highest IQ countries worldwide: Singapore (109), Japan (106), Taiwan (105), South Korea (104), and Estonia (102).

- Contrary to prior overestimates, China's average IQ is 100, on par with the Netherlands.

- Despite massive third world immigration, the average IQ in Western countries ranges from 95 to 100.

- Average IQ in the vast majority of Sub-Saharan African countries is between 65 and 75.

- "A strong correlation between IQ and GDP per capita was observed (r = .82)"

National IQs: measurement and defense, Parra & Kirkegaard (2025)