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?

Statizoid (derived), published as Population in urban agglomerations of more than 1 million, per capita. 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, per capita

Iran, Islamic Republic of

0.2522 units per person

in 2025

Spain

0.2542 units per person

in 2025

Iran, Islamic Republic of rank

48th

Spain rank

47th

Population in urban agglomerations of more than 1 million, per capita over time

Iran, Islamic Republic of
Spain

How they compare

Spain currently reports 0.2542 units per person against 0.2522 units per person in Iran, Islamic Republic of, a difference of 0.002 units per person.

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	0.1694 units per person	0.1802 units per person	0.0108 units per person	Spain
1970s	0.2084 units per person	0.2114 units per person	0.003 units per person	Spain
1980s	0.2267 units per person	0.2167 units per person	0.0101 units per person	Iran, Islamic Republic of
1990s	0.2305 units per person	0.224 units per person	0.0065 units per person	Iran, Islamic Republic of
2000s	0.2411 units per person	0.2293 units per person	0.0117 units per person	Iran, Islamic Republic of
2010s	0.2468 units per person	0.2448 units per person	0.002 units per person	Iran, Islamic Republic of
2020s	0.2509 units per person	0.2571 units per person	0.0063 units per person	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, per capita, Iran, Islamic Republic of or Spain?: Spain, at 0.2542 units per person against 0.2522 units per person in Iran, Islamic Republic of as of 2025.
What is the difference in population in urban agglomerations of more than 1 million, per capita between Iran, Islamic Republic of and Spain?: 0.002 units per person, 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, per capita?: Iran, Islamic Republic of ranks 48th and Spain ranks 47th of 121 countries.
Where does this data come from?: Statizoid (derived), published as Population in urban agglomerations of more than 1 million, per capita. 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, per capita. Statizoid, drawing on Statizoid (derived). Retrieved 12 September 2026, from https://urban.statizoid.com/compare/population-in-urban-agglomerations-of-more-than-1-million-per-capita/iran-islamic-rep/spain/

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

About this data

Indicator: Population in urban agglomerations of more than 1 million, per capita
Unit: units per person
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 121 places, 7,986 data points, 1960–2025
Last refreshed: 18 August 2026

Population in urban agglomerations of more than 1 million divided by Population, total, matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.