Congo vs Tonga: Lower secondary school starting age
Congo
12 years
in 2025
Tonga
12 years
in 2025
Congo rank
30th
Tonga rank
30th
Lower secondary school starting age over time
- Congo
- Tonga
How they compare
Congo currently reports 12 years against 12 years in Tonga, a difference of 0 years.
The two have swapped places 2 times across 56 shared years of data; in 1970 it was Tonga ahead.
Congo ranks 30th and Tonga ranks 30th of 209 countries.
Congo has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Congo | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 12 years | 12 years | 0 years | — |
| 1980s | 12 years | 11.4 years | 0.6 years | Congo |
| 1990s | 12 years | 11 years | 1 years | Congo |
| 2000s | 12 years | 11 years | 1 years | Congo |
| 2010s | 12 years | 11.8 years | 0.2 years | Congo |
| 2020s | 12 years | 12 years | 0 years | — |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher lower secondary school starting age, Congo or Tonga?
- Congo, at 12 years against 12 years in Tonga as of 2025.
- What is the difference in lower secondary school starting age between Congo and Tonga?
- 0 years, with Congo ahead.
- How many years of comparable data are there for Congo and Tonga?
- 56 years are reported by both, from 1970 to 2025.
- How do Congo and Tonga rank globally for lower secondary school starting age?
- Congo ranks 30th and Tonga ranks 30th of 209 countries.
- Where does this data come from?
- Data API, UN Educational, Scientific and Cultural Organization (UNESCO), published as Lower secondary school starting age (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Lower secondary school starting age is the age at which students would enter lower secondary education, assuming they had started at the official entrance age for the lowest level of education, had studied full-time throughout and had progressed through the system without repeating or skipping a grade.