Average IQ in Tonga
Tonga has an average IQ of 87, ranking #97 out of 195 countries globally. This is considered below average on the worldwide scale.
Key Statistics
Education System in Tonga
Tonga provides free compulsory education from ages 6 to 14 in Tongan and English. The kingdom has one of the Pacific's highest literacy rates.
IQ and Economic Development
Tonga's GDP per capita of $7,130 reflects a lower-income economy. Research shows a moderate correlation (r ≈ 0.7) between national GDP and measured IQ, though this relationship is complex and bidirectional.
With 11.1 average years of schooling and a 5% GDP investment in education, Tonga maintains a moderate investment in education.
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Countries with Similar IQ Scores
Oceania Rankings
| # | Country | Avg IQ |
|---|---|---|
| 1 | Australia | 102 |
| 2 | New Zealand | 101 |
| 3 | Fiji | 87 |
| 4 | Samoa | 87 |
| 5 | Papua New Guinea | 84 |
| 6 | Kiribati | 84 |
| 7 | Marshall Islands | 84 |
| 8 | Micronesia | 84 |
| 9 | Nauru | 84 |
| 10 | Palau | 84 |
Data Sources for Tonga
National IQ estimates are approximate and based on meta-analyses of available cognitive testing data (Becker, 2019; Lynn & Vanhanen, 2012; World Population Review, 2025). These scores reflect measured test performance and are influenced by education, nutrition, healthcare, and socioeconomic factors — they do not measure innate intelligence. Within-country variation is much larger than between-country differences. IQ tests developed in Western contexts may not translate fairly across all cultures. Interpret with appropriate caution.
See the full methodology on our main IQ by Country page for complete source descriptions and data quality notes.
Frequently Asked Questions
See where your own score lands.
Tonga's average is an estimate from limited data. Your own number is something you can measure: take the free 50-question IQ test for your exact score and where you land against every country on this map.