Lower secondary school completion rates, adjusted gender parity index in Tonga
Tonga: Lower secondary school completion rates, adjusted gender parity index was 1.11 index in 2025. ▲ Rising
Lower secondary school completion rates, adjusted gender parity index in Tonga, 1981–2025
Source: UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data. Measured in index.
Analysis
Tonga recorded 1.11 index for lower secondary school completion rates, adjusted gender parity index in 2025.
Compared with earlier readings it is down 0.2% on the previous year and down 0.8% over ten years.
Over the whole period, lower secondary school completion rates, adjusted gender parity index in Tonga peaked at 1.12 index in 2008 and was at its lowest, 1.02 index, in 1981.
That places Tonga 37th out of 164 countries with data for 2025, putting it in the top quarter.
The long-run direction has been consistently rising across the 45 years of available data.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1.05 index | 1.02 index | 1.07 index | 9 |
| 1990s | 1.08 index | 1.07 index | 1.1 index | 10 |
| 2000s | 1.11 index | 1.1 index | 1.12 index | 10 |
| 2010s | 1.12 index | 1.11 index | 1.12 index | 10 |
| 2020s | 1.11 index | 1.11 index | 1.11 index | 6 |
Countries ranked near Tonga
More gender data for Tonga
- Age population, age 00, female, interpolated 1,112 (2025)
- Age population, age 00, male, interpolated 1,200 (2025)
- Age population, age 01, female, interpolated 1,106 (2025)
- Age population, age 01, male, interpolated 1,195 (2025)
- Age population, age 02, female, interpolated 1,110 (2025)
- Age population, age 02, male, interpolated 1,200 (2025)
- Age population, age 03, female, interpolated 1,117 (2025)
- Age population, age 03, male, interpolated 1,209 (2025)
- Age population, age 04, female, interpolated 1,105 (2025)
- Age population, age 04, male, interpolated 1,195 (2025)
Frequently asked questions
- What is lower secondary school completion rates, adjusted gender parity index in Tonga?
- Lower secondary school completion rates, adjusted gender parity index in Tonga was 1.11 index in 2025, according to UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data.
- What is the highest lower secondary school completion rates, adjusted gender parity index recorded in Tonga?
- The highest recorded value was 1.12 index in 2008.
- What is the lowest lower secondary school completion rates, adjusted gender parity index recorded in Tonga?
- The lowest recorded value was 1.02 index in 1981.
- How does Tonga rank for lower secondary school completion rates, adjusted gender parity index?
- Tonga ranks 37th out of 164 countries with data for 2025.
- Is lower secondary school completion rates, adjusted gender parity index rising or falling in Tonga?
- Over the last ten years it is down 0.8%. The long-run trend across the full record is rising.
- Where does this Tonga data come from?
- The figures come from UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data, published as part of Lower secondary school completion rates, adjusted gender parity index. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 45 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
An adjusted gender parity index of 1 indicates equal lower secondary school completion rates between boys and girls. Values below 1 favor boys, and values above 1 favor girls.