Iran vs United States: Theoretical duration of upper secondary education (years)
Iran
3 years
in 2025
United States
3 years
in 2025
Iran rank
52nd
United States rank
52nd
Theoretical duration of upper secondary education (years) over time
- Iran
- United States
How they compare
Iran currently reports 3 years against 3 years in United States, a difference of 0 years.
The two have swapped places 2 times across 56 shared years of data; in 1970 it was United States ahead.
Iran ranks 52nd and United States ranks 52nd of 221 countries.
Iran has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Iran | United States | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 3.2 years | 3 years | 0.2 years | Iran |
| 1980s | 4 years | 3 years | 1 years | Iran |
| 1990s | 4 years | 3 years | 1 years | Iran |
| 2000s | 4 years | 3 years | 1 years | Iran |
| 2010s | 3.6 years | 3 years | 0.6 years | Iran |
| 2020s | 3 years | 3 years | 0 years | — |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher theoretical duration of upper secondary education, Iran or United States?
- Iran, at 3 years against 3 years in United States as of 2025.
- What is the difference in theoretical duration of upper secondary education between Iran and United States?
- 0 years, with Iran ahead.
- How many years of comparable data are there for Iran and United States?
- 56 years are reported by both, from 1970 to 2025.
- How do Iran and United States rank globally for theoretical duration of upper secondary education?
- Iran ranks 52nd and United States ranks 52nd of 221 countries.
- Where does this data come from?
- UNESCO Institute for Statistics, published as Theoretical duration of upper 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