Cook Islands vs Tonga: Theoretical duration of lower secondary education (years)
Cook Islands
4 years
in 2025
Tonga
4 years
in 2025
Cook Islands rank
18th
Tonga rank
18th
Theoretical duration of lower secondary education (years) over time
- Cook Islands
- Tonga
How they compare
Cook Islands currently reports 4 years against 4 years in Tonga, a difference of 0 years.
Across all 56 years both countries report, Tonga has been ahead every year.
Cook Islands ranks 18th and Tonga ranks 18th of 221 countries.
Tonga has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Cook Islands | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 3 years | 4 years | 1 years | Tonga |
| 1980s | 3 years | 4 years | 1 years | Tonga |
| 1990s | 3.2 years | 4 years | 0.8 years | Tonga |
| 2000s | 4 years | 4 years | 0 years | — |
| 2010s | 4 years | 4.8 years | 0.8 years | Tonga |
| 2020s | 4 years | 4.5 years | 0.5 years | Tonga |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher theoretical duration of lower secondary education, Cook Islands or Tonga?
- Cook Islands, at 4 years against 4 years in Tonga as of 2025.
- What is the difference in theoretical duration of lower secondary education between Cook Islands and Tonga?
- 0 years, with Cook Islands ahead.
- How many years of comparable data are there for Cook Islands and Tonga?
- 56 years are reported by both, from 1970 to 2025.
- How do Cook Islands and Tonga rank globally for theoretical duration of lower secondary education?
- Cook Islands ranks 18th and Tonga ranks 18th of 221 countries.
- Where does this data come from?
- UNESCO Institute for Statistics, published as Theoretical duration of lower secondary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
February 2026 Data Release