Population of Thailand

As of April 2025, the population of Thailand is 71.9 million. The number of inhabitants has increased by 60 thousand in the last year, representing a growth of 0.09%. The median age of the population has increased in recent years, rising from 36.5 years in 2015 to 41.2 years in 2025. Currently, life expectancy at birth is 80.3 years and population density is 140.8 inhabitants per square kilometer.

Population Growth

The population growth rate of Thailand peaked in 1963, reaching around 3.05% annually, but has since declined to approximately 0.08% in 2025. The annual increase in the number of people has also decreased from a peak of around 1.04 million in 1973 to nearly 60.41 thousand in 2025.

Life Expectancy

In Thailand, life expectancy at birth has been increasing, with the indicator rising from 73.8 years in 2005 to 80.3 years in 2025, representing an increase of almost 7 years over the past 2 decades.

Most populous cities in Thailand

Thailand has several cities considered medium-sized by their number of inhabitants, but there is also a large one. The most populous city is Bangkok, con una diferencia significativa sobre las demás, alcanzando approximately 5.1 million inhabitants. It is followed by Samut Prakan with 388.9 thousand and Mueang Nonthaburi, Nonthaburi with 254.4 thousand.

These are the 20 most populous cities in Thailand: