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

66 years are reported by both, from 1960 to 2025.

Where does this data come from?

World Urbanization Prospects 2018, United Nations (UN), published as Population in urban agglomerations of more than 1 million (% of total population). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Iran, Islamic Republic of vs Spain: Population in urban agglomerations of more than 1 million

Iran, Islamic Republic of

25.2%

in 2025

Spain

25.4%

in 2025

Iran, Islamic Republic of rank

48th

Spain rank

47th

Population in urban agglomerations of more than 1 million over time

Iran, Islamic Republic of
Spain

How they compare

Spain currently reports 25.4% against 25.2% in Iran, Islamic Republic of, a difference of 0.2%.

The two have swapped places 2 times across 66 shared years of data; in 1960 it was Spain ahead.

Iran, Islamic Republic of ranks 48th and Spain ranks 47th of 121 countries.

Across the 7 decades both report, Iran, Islamic Republic of averaged higher in 4 and Spain in 3.

Head to head by decade

Decade	Iran, Islamic Republic of	Spain	Difference	Ahead
1960s	16.9%	18.0%	1.1%	Spain
1970s	20.8%	21.1%	0.3%	Spain
1980s	22.7%	21.7%	1.0%	Iran, Islamic Republic of
1990s	23.1%	22.4%	0.6%	Iran, Islamic Republic of
2000s	24.1%	22.9%	1.2%	Iran, Islamic Republic of
2010s	24.7%	24.5%	0.2%	Iran, Islamic Republic of
2020s	25.1%	25.7%	0.6%	Spain

Averages of every year both report within each decade.

Frequently asked questions

Which has higher population in urban agglomerations of more than 1 million, Iran, Islamic Republic of or Spain?: Spain, at 25.4% against 25.2% in Iran, Islamic Republic of as of 2025.
What is the difference in population in urban agglomerations of more than 1 million between Iran, Islamic Republic of and Spain?: 0.2%, with Spain ahead.
How many years of comparable data are there for Iran, Islamic Republic of and Spain?: 66 years are reported by both, from 1960 to 2025.
How do Iran, Islamic Republic of and Spain rank globally for population in urban agglomerations of more than 1 million?: Iran, Islamic Republic of ranks 48th and Spain ranks 47th of 121 countries.
Where does this data come from?: World Urbanization Prospects 2018, United Nations (UN), published as Population in urban agglomerations of more than 1 million (% of total population). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Iran, Islamic Republic of vs Spain: Population in urban agglomerations of more than 1 million. Statizoid, drawing on World Urbanization Prospects 2018, United Nations (UN). Retrieved 16 September 2026, from https://climate.statizoid.com/compare/population-in-urban-agglomerations-of-more-than-1-million-percent-of-total-population/iran-islamic-rep/spain/

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<a href="https://climate.statizoid.com/compare/population-in-urban-agglomerations-of-more-than-1-million-percent-of-total-population/iran-islamic-rep/spain/">Iran, Islamic Republic of vs Spain: Population in urban agglomerations of more than 1 million</a> — Statizoid

About this data

Indicator: Population in urban agglomerations of more than 1 million (% of total population)
Unit: % of total population
Source: World Urbanization Prospects 2018, United Nations (UN)
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 158 places, 10,428 data points, 1960–2025
Last refreshed: 03 September 2026

Population in urban agglomerations of more than one million is the percentage of a country's population living in metropolitan areas that in 2018 had a population of more than one million people.