Thailand's population in 2025 reached 70.3 million, according to the latest census, with a growth rate falling to a record-low of 0.42%. The census also reports a decline in average household size to 2.5 people, reflecting significant demographic shifts. These findings were announced by the National Statistical Office (NSO), with key officials Jirawan Boonperm and Patchara Anuntasilpa detailing the implications for society and policy.

Conducted by the NSO, the 2025 Census marks the 12th population count and the 6th housing census in Thailand. This census introduced a Digital First Approach, encouraging data submission via digital platforms, with 1 April 2025 chosen as “Census Day.” The data compiled included both Thai nationals and foreign residents based on their actual current residence.

This census provides crucial data on population distribution, socio-economic characteristics, and housing conditions at multiple levels. These insights are expected to aid various agencies in planning and managing resources, infrastructure, and public services, catering to the evolving needs of Thailand’s demographic landscape.

Thailand's resident population has increased slightly, yet the declining birth rate signifies the nation is transitioning into a Complete-aged Society. With fewer children and working-age individuals, the shift poses significant challenges for labor, welfare, and health services aimed at supporting an ageing population. The NSO stresses the importance of adapting systems to accommodate these demographic changes.

The census also highlights a trend towards smaller households, notably with an increase in single-person homes and condominium living. This shift calls for urban planning and infrastructure that accommodates diverse and ageing populations through Universal Design principles. As the population ages, promoting healthy ageing and prolonged workforce participation are becoming urgent priorities.

The 2025 Census data are expected to guide policies on retirement age and infrastructure development suited to an aging society. These facts will serve as empirical foundations for public and private sector decision-making. The aim is to navigate these demographic challenges while steering Thailand toward a stable and sustainable future, reported The Nation.

Key Takeaways

• Thailand's population growth rate is at a historic low of 0.42%.

• Average household size has decreased to 2.5 people.

• Policies will focus on ageing population needs and infrastructure planning.

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Adapted by ASEAN Now from The Nation 2026-01-27

 

 

This article should make uncomfortable reading for the next Prime Minister of Thailand.

Out of curiosity, I did a Web search of two key indicators cited above comparing Thailand with other South East Asian nations and the results highlight a worrying trend.

The first indicator I looked at was the median age in each country:

1. Singapore: ~42.8 years (2023 est.)

2. Thailand: ~40.5 years (2023 est.)

3. Vietnam: ~33.6 years (2023 est.)

4. Brunei: ~33.2 years (2023 est.)

5. Malaysia: ~30.8 years (2023 est.)

6. Myanmar (Burma): ~30.0 years (2023 est.)

7. Indonesia: ~30.0 years (2023 est.)

8. Philippines: ~25.7 years (2023 est.)

9. Cambodia: ~26.8 years (2023 est.)

10. Laos: ~24.4 years (2023 est.)

11. Timor-Leste: ~21.6 years (2023 est.)

Next, I looked at each country's growth rate:

1. Singapore: ~0.43% (subject to immigration policy fluctuations)

2. Thailand: ~0.42% (as per your 2025 census data)

3. Brunei: ~0.74%

4. Vietnam: ~0.73%

5. Myanmar (Burma): ~0.72%

6. Indonesia: ~0.74%

7. Malaysia: ~1.26%

8. Cambodia: ~1.31%

9. Laos: ~1.56%

10. Philippines: ~1.54%

11. Timor-Leste: ~1.96%

This growth rate ranking is almost the inverse of the median age ranking!

Now, I'm no demographer, but these figures suggest that Thailand is facing some challenges in the future that its neighbours are better placed to address.

The combination of Thailand's median age of ~40.5 years and an annual population growth rate of just 0.42% signals (what the Web says is) an imminent and sustained contraction of its working-age population.

Consequently, the nation faces a daunting triple squeeze: a shrinking tax base from fewer workers, soaring government expenditures on pensions and elderly healthcare, and potential labor shortages that could stifle economic growth and competitiveness.

Thailand's population is (like many Western nations) aging but without the same level of wealth to cushion the blow.

Meanwhile, neighbors like the Philippines (median age ~25.7, growth ~1.54%) and Vietnam (~33.6 years, ~0.73% growth) face a different set of challenges and opportunities. Their younger populations and positive growth rates provide, what I'm told by the Web is, a demographic dividend (a large, growing workforce that can fuel economic expansion if paired with sufficient education and job creation).

Their primary concerns for the other nations are investing in youth, generating employment, and building infrastructure. For them, the fiscal crises of aging are a future concern. Whereas for Thailand, they are a present and pressing reality.

This divergence means that while the region's younger nations must manage the dynamism of growth, Thailand must engineer a complex response to demographic decline, requiring profound policy shifts in immigration, labor productivity, and social security to avert a fiscal and societal crisis.

Sources & Attribution:

The comparative demographic data (median age and growth rate estimates for Southeast Asian nations) was compiled from current CIA World Factbook and UN Population Division estimates, consistent with figures widely reported for 2023-2024.

The analysis of the implications - specifically the concepts of the "triple squeeze," "demographic dividend," and the comparative challenges facing Thailand versus its neighbours - was developed with the assistance of an AI analysis tool to help structure the economic and policy implications of the raw data.

The core observation and concern regarding Thailand's trajectory are my own.

Aside from moving to Laos (/s), AI will be replacing many of those jobs in every country.

Could increased immigration, attraction of capital investment, and labour help?

AI and AI operated robotics will crush labor demand. What is wrong with smaller populations, btw? Better quality of life, more space, and lower costs accompany smaller numbers.

59 minutes ago, John Drake said:

AI and AI operated robotics will crush labor demand. What is wrong with smaller populations, btw? Better quality of life, more space, and lower costs accompany smaller numbers.

Fewer working citizens means a much bigger portion of their income has to go to the government to pay the debt and Social Security.

AI and the robots will need to make a really huge leap forward in productivity.

Thailand has so far been incapable of addressing any drought crisis, flood crisis, pollution crisis, corruption crisis, etc., in the short-term it will also fail in addressing the demographic problem and the crises enumerated above.

On 1/29/2026 at 1:44 AM, JimHuaHin said:

Thailand has so far been incapable of addressing any drought crisis, flood crisis, pollution crisis, corruption crisis, etc., in the short-term it will also fail in addressing the demographic problem and the crises enumerated above.

Drought, flood, pollution and corruption will pale into insignificance compared to low population growth, in a country that does not have a reasonable pathway to PR and / or citizenship.

China's population will halve over the next fifty years.

India will reduce by around 10%. (It had zero growth recently for the first time ever).

It's the same with most developed economies although immigration will impact some.

TBH it's why I'm not too worried by climate change longer term.

How individual countries/regions manage this transition including the difficult decision of how much do you spend on the ageing will be vital.

14 minutes ago, Spilornis said:

TBH it's why I'm not too worried by climate change longer term.

China and India have over a billion people each. Both countries are growing a middle class, rapidly. Many will aspire to owning a motor scooter or car in the future, and who can blame them?

Picture hundreds and hundreds of millions of extra fossil fuel machines in China and India, or, burning so much coal to supply power to charge EV bikes and cars in the future.

Climate change is not just about the number of humans on the planet, it's about the amount and type of energy humans consume / burn.

On 1/27/2026 at 9:04 PM, davb said:

Fewer working citizens means a much bigger portion of their income has to go to the government to pay the debt and Social Security.

AI and the robots will need to make a really huge leap forward in productivity.

The "vaccines" are working. The money and resources used to take care of the population will go into data centers. They keep popping up everywhere. This was all planned.

Women pushed into the labour market is ruining many developing nations. Whilst the short term logic is you need that workforce, it actually long term hurts the economy.

Most women in India stay at home, and it's birth rate is massive. The result they have a massive market of young men under 30. When you compare the rate per population to other countries it's still massive.

2 hours ago, DonniePeverley said:

Most women in India stay at home, and it's birth rate is massive

Maybe in years gone by but as of 2025 the birth rate was 1.9 ( slightly below replacement rate).

What keeps the population numbers increasing is people living longer.

In fifty years if not sooner the Indian population in raw numbers will decline.

About the only places where the birth rate is over 2 are in Africa. (27 out of the top 30 countries are in Africa)