Thailand Population Pyramid 1975
Thailand in 1975
In 1975, Thailand had a total population of 40,940,004 people. A decade earlier, in 1965, the population was 31,149,337; it has grown by 31.4% since.
With a median age of 18.4 years, Thailand had a youth dependency ratio of 77.9 and an old-age dependency ratio of 5.7 per 100 people of working age. This is an expansive pyramid — each cohort of children is larger than the one above it, the signature of high birth rates and rapid growth.
Data source: United Nations World Population Prospects, 2024 revision (medium variant) — last updated July 2024.
The fertility rate of Thailand was 1.21 births per woman in 2023, under the 2.1 needed to replace each generation.
Source: World Bank World Development Indicators, latest available year.
Life expectancy at birth was 76.4 years in 2023: 80.9 for women and 72.2 for men.
Source: World Bank World Development Indicators, latest available year.
2,906,155 immigrants live in Thailand, 4.1% of the population.
| Myanmar | 1,708,695 |
| Cambodia | 375,635 |
| Laos | 285,819 |
| United Kingdom | 116,582 |
| Japan | 104,515 |
1,178,284 people born in Thailand live in other countries.
| United States of America | 307,741 |
| Republic of Korea | 199,861 |
| Australia | 109,845 |
| Taiwan | 80,032 |
| Malaysia | 70,718 |
Source: United Nations International Migrant Stock 2024.
| Country | Population | Median age | Relative size |
|---|---|---|---|
| Thailand | 40,940,005 | 18.4 | |
| Philippines | 42,120,826 | 16.3 | |
| Viet Nam | 46,482,903 | 18.7 | |
| Myanmar | 30,176,565 | 19.7 | |
| Malaysia | 11,471,914 | 18.6 |





