Average years of schooling among adults in Tonga
Tonga: Average years of schooling among adults was 10.91 years in 2023. ▲ Rising
Average years of schooling among adults in Tonga, 1990–2023
Source: UNDP, Human Development Report (2025) – with minor processing by Our World in Data. Measured in years.
Analysis
Tonga recorded 10.91 years for average years of schooling among adults in 2023.
That represents a change of up 0.1% over ten years.
Over the whole period, average years of schooling among adults in Tonga peaked at 10.92 years in 2011 and was at its lowest, 9.12 years, in 1990.
Tonga ranks 71st of 192 countries on this measure, in the middle of the range.
The long-run direction has been consistently rising across the 34 years of available data.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1990s | 9.76 years | 9.12 years | 10.04 years | 10 |
| 2000s | 10.16 years | 10.05 years | 10.58 years | 10 |
| 2010s | 10.87 years | 10.75 years | 10.92 years | 10 |
| 2020s | 10.91 years | 10.88 years | 10.91 years | 4 |
Countries ranked near Tonga
- 68 Malaysia 11.09 years compare
- 69 Azerbaijan 11.07 years compare
- 70 Bosnia and Herzegovina 10.97 years compare
- 72 Saint Kitts and Nevis 10.85 years compare
- 73 Iran 10.85 years compare
- 74 Panama 10.83 years compare
More education data for Tonga
- Duration of pre-primary education 2 years (2025)
- Official entrance age to pre-primary education 4 years (2025)
- Population ages 15-64 58.2% (2025)
- Population ages 0-14 34.9% (2025)
- Lower secondary school starting age 12 years (2025)
- Primary school starting age 6 years (2025)
- School enrollment, primary 108.8% (2024)
- Primary education, teachers 818 (2024)
- Fertility rate vs. average years of schooling 3.1 live births per woman (2024)
- School enrollment, primary, female 110.7% (2024)
Frequently asked questions
- What is average years of schooling among adults in Tonga?
- Average years of schooling among adults in Tonga was 10.91 years in 2023, according to UNDP, Human Development Report (2025) – with minor processing by Our World in Data.
- What is the highest average years of schooling among adults recorded in Tonga?
- The highest recorded value was 10.92 years in 2011.
- What is the lowest average years of schooling among adults recorded in Tonga?
- The lowest recorded value was 9.12 years in 1990.
- How does Tonga rank for average years of schooling among adults?
- Tonga ranks 71st out of 192 countries with data for 2023.
- Is average years of schooling among adults rising or falling in Tonga?
- Over the last ten years it is up 0.1%. The long-run trend across the full record is rising.
- Where does this Tonga data come from?
- The figures come from UNDP, Human Development Report (2025) – with minor processing by Our World in Data, published as part of Average years of schooling among adults. Statizoid updates them automatically from the source API.
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About this data
Average number of years (excluding years spent repeating individual grades) adults over 25 years participated in formal education.