What is the difference in secondary education, duration between Iran, Islamic Republic of and South Sudan?

0 years, with Iran, Islamic Republic of ahead.

How many years of comparable data are there for Iran, Islamic Republic of and South Sudan?

27 years are reported by both, from 1999 to 2025.

Where does this data come from?

Data API, UN Educational, Scientific and Cultural Organization (UNESCO), published as Secondary education, duration (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Iran, Islamic Republic of vs South Sudan: Secondary education, duration

Iran, Islamic Republic of

6 years

in 2025

South Sudan

6 years

in 2025

Iran, Islamic Republic of rank

91st

South Sudan rank

91st

Secondary education, duration over time

Iran, Islamic Republic of
South Sudan

How they compare

Iran, Islamic Republic of currently reports 6 years against 6 years in South Sudan, a difference of 0 years.

The two have swapped places 1 time across 27 shared years of data; in 1999 it was Iran, Islamic Republic of ahead.

Iran, Islamic Republic of ranks 91st and South Sudan ranks 91st of 209 countries.

Iran, Islamic Republic of has averaged higher in every one of the 4 decades both report.

Head to head by decade

Decade	Iran, Islamic Republic of	South Sudan	Difference	Ahead
1990s	7 years	6 years	1 years	Iran, Islamic Republic of
2000s	7 years	6 years	1 years	Iran, Islamic Republic of
2010s	6.3 years	6 years	0.3 years	Iran, Islamic Republic of
2020s	6 years	6 years	0 years	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher secondary education, duration, Iran, Islamic Republic of or South Sudan?: Iran, Islamic Republic of, at 6 years against 6 years in South Sudan as of 2025.
What is the difference in secondary education, duration between Iran, Islamic Republic of and South Sudan?: 0 years, with Iran, Islamic Republic of ahead.
How many years of comparable data are there for Iran, Islamic Republic of and South Sudan?: 27 years are reported by both, from 1999 to 2025.
How do Iran, Islamic Republic of and South Sudan rank globally for secondary education, duration?: Iran, Islamic Republic of ranks 91st and South Sudan ranks 91st of 209 countries.
Where does this data come from?: Data API, UN Educational, Scientific and Cultural Organization (UNESCO), published as Secondary education, duration (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Iran, Islamic Republic of vs South Sudan: Secondary education, duration. Statizoid, drawing on Data API, UN Educational, Scientific and Cultural Organization (UNESCO). Retrieved 23 August 2026, from https://education.statizoid.com/compare/secondary-education-duration-years/iran-islamic-rep/south-sudan/

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About this data

Indicator: Secondary education, duration (years)
Unit: years
Source: Data API, UN Educational, Scientific and Cultural Organization (UNESCO)
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 255 places, 13,986 data points, 1970–2025
Last refreshed: 20 August 2026

Secondary duration refers to the number of grades (years) in secondary school.