Congo vs Iran: Official entrance age to lower secondary education
Congo
12 years
in 2025
Iran
12 years
in 2025
Congo rank
30th
Iran rank
30th
Official entrance age to lower secondary education over time
- Congo
- Iran
How they compare
Congo currently reports 12 years against 12 years in Iran, a difference of 0 years.
The two have swapped places 2 times across 56 shared years of data; in 1970 it was Iran ahead.
Congo ranks 30th and Iran ranks 30th of 215 countries.
Congo has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Congo | Iran | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 12 years | 11.2 years | 0.8 years | Congo |
| 1980s | 12 years | 11 years | 1 years | Congo |
| 1990s | 12 years | 11 years | 1 years | Congo |
| 2000s | 12 years | 11 years | 1 years | Congo |
| 2010s | 12 years | 11.7 years | 0.3 years | Congo |
| 2020s | 12 years | 12 years | 0 years | — |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher official entrance age to lower secondary education, Congo or Iran?
- Congo, at 12 years against 12 years in Iran as of 2025.
- What is the difference in official entrance age to lower secondary education between Congo and Iran?
- 0 years, with Congo ahead.
- How many years of comparable data are there for Congo and Iran?
- 56 years are reported by both, from 1970 to 2025.
- How do Congo and Iran rank globally for official entrance age to lower secondary education?
- Congo ranks 30th and Iran ranks 30th of 215 countries.
- Where does this data come from?
- UNESCO Institute for Statistics, published as Official entrance age to 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