Iran (Islamic Republic of) vs United Kingdom: Population in largest city
Iran (Islamic Republic of)
9.73 million
in 2025
United Kingdom
9.84 million
in 2025
Iran (Islamic Republic of) rank
25th
United Kingdom rank
23rd
Population in largest city over time
- Iran (Islamic Republic of)
- United Kingdom
How they compare
United Kingdom currently reports 9.84 million against 9.73 million in Iran (Islamic Republic of), a difference of 111,000.
The two have swapped places 2 times across 66 shared years of data; in 1960 it was United Kingdom ahead.
Iran (Islamic Republic of) ranks 25th and United Kingdom ranks 23rd of 153 countries.
Across the 7 decades both report, Iran (Islamic Republic of) averaged higher in 1 and United Kingdom in 6.
Head to head by decade
| Decade | Iran (Islamic Republic of) | United Kingdom | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 2.46 million | 7.90 million | 5.44 million | United Kingdom |
| 1970s | 4.15 million | 7.17 million | 3.02 million | United Kingdom |
| 1980s | 5.73 million | 6.74 million | 1.01 million | United Kingdom |
| 1990s | 6.68 million | 7.01 million | 331,380 | United Kingdom |
| 2000s | 7.58 million | 7.53 million | 58,032 | Iran (Islamic Republic of) |
| 2010s | 8.51 million | 8.61 million | 94,187 | United Kingdom |
| 2020s | 9.44 million | 9.58 million | 147,717 | United Kingdom |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher population in largest city, Iran (Islamic Republic of) or United Kingdom?
- United Kingdom, at 9.84 million against 9.73 million in Iran (Islamic Republic of) as of 2025.
- What is the difference in population in largest city between Iran (Islamic Republic of) and United Kingdom?
- 111,000, with United Kingdom ahead.
- How many years of comparable data are there for Iran (Islamic Republic of) and United Kingdom?
- 66 years are reported by both, from 1960 to 2025.
- How do Iran (Islamic Republic of) and United Kingdom rank globally for population in largest city?
- Iran (Islamic Republic of) ranks 25th and United Kingdom ranks 23rd of 153 countries.
- Where does this data come from?
- World Urbanization Prospects 2018, United Nations (UN), published as Population in largest city. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Population in largest city is the urban population living in the country's largest metropolitan area.