School age population, secondary education, both sexes in Thailand
Thailand: School age population, secondary education, both sexes was 4.62 million in 2025. ▼ Falling
Latest (2025)
4.62 million
Change on year
down 1.2%
World rank
37th
of 220 countries
All-time high
7.16 million
in 1987
All-time low
3.91 million
in 1970
Years of data
56
1970–2025
School age population, secondary education, both sexes in Thailand, 1970–2025
Source: UNESCO Institute for Statistics.
Analysis
Thailand recorded 4.62 million for school age population, secondary education, both sexes in 2025.
That represents a change of down 1.2% on the previous year and down 14.9% over ten years.
Over the whole period, school age population, secondary education, both sexes in Thailand peaked at 7.16 million in 1987 and was at its lowest, 3.91 million, in 1970.
That places Thailand 37th out of 220 countries with data for 2025, putting it in the top quarter.
The long-run direction has been consistently falling across the 56 years of available data.
School age population, secondary education, both sexes in Thailand, year by year
| Year | Value | Change |
|---|---|---|
| 1970 | 3.91 million | — |
| 1971 | 4.05 million | +3.6% |
| 1972 | 4.19 million | +3.4% |
| 1973 | 4.33 million | +3.3% |
| 1974 | 4.47 million | +3.3% |
| 1975 | 4.61 million | +3.2% |
| 1976 | 4.76 million | +3.2% |
| 1977 | 4.91 million | +3.2% |
| 1978 | 5.07 million | +3.3% |
| 1979 | 6.37 million | +25.6% |
| 1980 | 6.55 million | +2.8% |
| 1981 | 6.72 million | +2.6% |
| 1982 | 6.87 million | +2.2% |
| 1983 | 6.98 million | +1.6% |
| 1984 | 7.06 million | +1.1% |
| 1985 | 7.11 million | +0.7% |
| 1986 | 7.15 million | +0.5% |
| 1987 | 7.16 million | +0.1% |
| 1988 | 7.13 million | -0.4% |
| 1989 | 7.10 million | -0.3% |
| 1990 | 7.06 million | -0.7% |
| 1991 | 6.92 million | -2.0% |
| 1992 | 6.79 million | -1.8% |
| 1993 | 6.69 million | -1.6% |
| 1994 | 6.63 million | -0.9% |
| 1995 | 6.60 million | -0.4% |
| 1996 | 6.59 million | -0.1% |
| 1997 | 6.60 million | +0.2% |
| 1998 | 6.62 million | +0.2% |
| 1999 | 6.63 million | +0.1% |
| 2000 | 6.36 million | -4.0% |
| 2001 | 6.36 million | +0.0% |
| 2002 | 6.33 million | -0.4% |
| 2003 | 6.31 million | -0.3% |
| 2004 | 6.31 million | -0.1% |
| 2005 | 6.31 million | +0.1% |
| 2006 | 6.32 million | +0.2% |
| 2007 | 6.32 million | -0.1% |
| 2008 | 6.29 million | -0.5% |
| 2009 | 6.23 million | -1.0% |
| 2010 | 6.13 million | -1.5% |
| 2011 | 5.62 million | -8.3% |
| 2012 | 5.60 million | -0.5% |
| 2013 | 5.55 million | -0.8% |
| 2014 | 5.50 million | -1.0% |
| 2015 | 5.43 million | -1.2% |
| 2016 | 5.36 million | -1.4% |
| 2017 | 5.28 million | -1.5% |
| 2018 | 5.19 million | -1.6% |
| 2019 | 5.11 million | -1.7% |
| 2020 | 5.02 million | -1.8% |
| 2021 | 4.93 million | -1.8% |
| 2022 | 4.83 million | -1.9% |
| 2023 | 4.74 million | -2.0% |
| 2024 | 4.68 million | -1.3% |
| 2025 | 4.62 million | -1.2% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 4.67 million | 3.91 million | 6.37 million | 10 |
| 1980s | 6.98 million | 6.55 million | 7.16 million | 10 |
| 1990s | 6.71 million | 6.59 million | 7.06 million | 10 |
| 2000s | 6.31 million | 6.23 million | 6.36 million | 10 |
| 2010s | 5.48 million | 5.11 million | 6.13 million | 10 |
| 2020s | 4.80 million | 4.62 million | 5.02 million | 6 |
Countries ranked near Thailand
More education data for Thailand
- Enrolment in tertiary education, all programmes, both sexes (number) 7.31 % change on previous year (2025)
- Teachers in primary education, female (number), gaps filled 208,533 (2025)
- Teachers in primary education, male (number), gaps filled 96,835 (2025)
- Enrolment in tertiary education, all programmes, female (number) 1.23 million (2025)
- Enrolment in tertiary education, all programmes, female (number) 7.51 % change on previous year (2025)
- Enrolment in tertiary education, all programmes, male (number), gaps 940,155 (2025)
- Enrolment in tertiary education, all programmes, male (number) 7.06 % change on previous year (2025)
- Theoretical duration of primary education (years), annual growth rate 0 % change on previous year (2025)
- Theoretical duration of pre-primary education (years), annual growth 0 % change on previous year (2025)
- Start of the academic school year (pre-primary to post-secondary non) 0.0494 % change on previous year (2025)
Frequently asked questions
- What is school age population, secondary education, both sexes in Thailand?
- School age population, secondary education, both sexes in Thailand was 4.62 million in 2025, according to UNESCO Institute for Statistics.
- What is the highest school age population, secondary education, both sexes recorded in Thailand?
- The highest recorded value was 7.16 million in 1987.
- What is the lowest school age population, secondary education, both sexes recorded in Thailand?
- The lowest recorded value was 3.91 million in 1970.
- How does Thailand rank for school age population, secondary education, both sexes?
- Thailand ranks 37th out of 220 countries with data for 2025.
- Is school age population, secondary education, both sexes rising or falling in Thailand?
- Over the last ten years it is down 14.9%. The long-run trend across the full record is falling.
- Where does this Thailand data come from?
- The figures come from UNESCO Institute for Statistics, published as part of School age population, secondary education, both sexes (number). Statizoid updates them automatically from the source API.
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About this data
February 2026 Data Release