What is the difference in share of the population with lower secondary education between Iran, Islamic Republic of and Portugal?

0.6%, with Iran, Islamic Republic of ahead.

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

12 years are reported by both, from 2006 to 2023.

Iran, Islamic Republic of vs Portugal: Share of the population with lower secondary education

Iran, Islamic Republic of

65.1%

in 2023

Portugal

64.5%

in 2024

Iran, Islamic Republic of rank

79th

Portugal rank

82nd

Share of the population with lower secondary education over time

Iran, Islamic Republic of
Portugal

How they compare

Iran, Islamic Republic of currently reports 65.1% against 64.5% in Portugal, a difference of 0.6%.

Across all 12 years both countries report, Iran, Islamic Republic of has been ahead every year.

Iran, Islamic Republic of ranks 79th and Portugal ranks 82nd of 135 countries.

Iran, Islamic Republic of has averaged higher in every one of the 3 decades both report.

Head to head by decade

Decade	Iran, Islamic Republic of	Portugal	Difference	Ahead
2000s	64.0%	36.3%	27.8%	Iran, Islamic Republic of
2010s	65.9%	50.2%	15.6%	Iran, Islamic Republic of
2020s	63.9%	61.0%	3.0%	Iran, Islamic Republic of

Averages of every year both report within each decade.

Frequently asked questions

Which has higher share of the population with lower secondary education, Iran, Islamic Republic of or Portugal?: Iran, Islamic Republic of, at 65.1% against 64.5% in Portugal as of 2023.
What is the difference in share of the population with lower secondary education between Iran, Islamic Republic of and Portugal?: 0.6%, with Iran, Islamic Republic of ahead.
How many years of comparable data are there for Iran, Islamic Republic of and Portugal?: 12 years are reported by both, from 2006 to 2023.
How do Iran, Islamic Republic of and Portugal rank globally for share of the population with lower secondary education?: Iran, Islamic Republic of ranks 79th and Portugal ranks 82nd of 135 countries.
Where does this data come from?: UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data, published as Share of the population with lower secondary education. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Iran, Islamic Republic of vs Portugal: Share of the population with lower secondary education. Statizoid, drawing on UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data. Retrieved 09 September 2026, from https://education.statizoid.com/compare/share-of-the-population-with-at-least-some-secondary-education/iran-islamic-rep/portugal/

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About this data

Indicator: Share of the population with lower secondary education
Unit: %
Source: UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 135 places, 1,912 data points, 1970–2024
Last refreshed: 28 August 2026

Share of adults aged 25 and older who have completed lower secondary education or higher.