Population of Iran

As of May 2025, the population of Iran is 90.3 million. The number of inhabitants has increased by 584 thousand in the last year, representing a growth of 0.67%. The median age of the population has increased in recent years, rising from 28.9 years in 2015 to 34.1 years in 2025. Currently, life expectancy at birth is 77.4 years and population density is 55.5 inhabitants per square kilometer.

Population Growth

The population growth rate of Iran peaked in 1981, reaching around 6.32% annually, but has since declined to approximately 0.65% in 2025. The annual increase in the number of people has also decreased from a peak of around 2.77 million in 1990 to nearly 584.26 thousand in 2025.

Life Expectancy

In Iran, life expectancy at birth has been increasing, with the indicator rising from 71.8 years in 2005 to 77.4 years in 2025, representing an increase of almost 6 years over the past 2 decades.

Most populous cities in Iran

Iran has multiple large cities with a significant number of inhabitants. The most populous city is Tehran, con una diferencia significativa sobre las demás, alcanzando approximately 7.2 million inhabitants. It is followed by Mashhad, Razavi Khorasan with 2.3 million and Isfahan with 1.5 million.

These are the 20 most populous cities in Iran: