Population of Mongolia

As of May 2025, the population of Mongolia is 3.5 million. The number of inhabitants has increased by 43 thousand in the last year, representing a growth of 1.27%. The median age of the population has increased in recent years, rising from 25.8 years in 2015 to 27.3 years in 2025. Currently, life expectancy at birth is 73.5 years and population density is 2.3 inhabitants per square kilometer.

Population Growth

The population growth rate of Mongolia peaked in 1960, reaching around 3.43% annually, but has since declined to approximately 1.22% in 2025. The annual increase in the number of people has also decreased from a peak of around 68.81 thousand in 2018 to nearly 43.26 thousand in 2025.

Life Expectancy

In Mongolia, life expectancy at birth has been increasing, with the indicator rising from 64.9 years in 2005 to 73.5 years in 2025, representing an increase of almost 9 years over the past 2 decades.

Most populous cities in Mongolia

The cities of Mongolia are small, with the 5 most populated adding up to around 1.1 million inhabitants. The most populous city is Ulan Bator, Ulaanbaatar, con una diferencia significativa sobre las demás, alcanzando approximately 844.8 thousand inhabitants. It is followed by Erdenet, Orhon with 97.8 thousand and Darhan, Darhan Uul with 83.9 thousand.

These are the 20 most populous cities in Mongolia: