Pupil-trained teacher ratio in lower secondary education in Thailand
Thailand: Pupil-trained teacher ratio in lower secondary education was 18.4 headcount basis in 2025. ▼ Falling
Pupil-trained teacher ratio in lower secondary education in Thailand, 2015–2025
Source: UNESCO Institute for Statistics. Measured in headcount basis.
Analysis
In 2025, pupil-trained teacher ratio in lower secondary education in Thailand stood at 18.4 headcount basis.
Compared with earlier readings it is up 1.3% on the previous year and down 27.9% over ten years.
Over the whole period, pupil-trained teacher ratio in lower secondary education in Thailand peaked at 25.5 headcount basis in 2015 and was at its lowest, 17.05 headcount basis, in 2020.
That places Thailand 50th out of 87 countries with data for 2025, putting it in the middle of the range.
The long-run direction has been consistently falling across the 11 years of available data.
Pupil-trained teacher ratio in lower secondary education in Thailand, year by year
| Year | headcount basis | Change |
|---|---|---|
| 2015 | 25.5 headcount basis | — |
| 2016 | 25.33 headcount basis | -0.7% |
| 2017 | 18.11 headcount basis | -28.5% |
| 2018 | 18.08 headcount basis | -0.1% |
| 2019 | 19.17 headcount basis | +6.0% |
| 2020 | 17.05 headcount basis | -11.1% |
| 2021 | 19.81 headcount basis | +16.2% |
| 2022 | 18.91 headcount basis | -4.6% |
| 2023 | 20.69 headcount basis | +9.4% |
| 2024 | 18.17 headcount basis | -12.2% |
| 2025 | 18.4 headcount basis | +1.3% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2010s | 21.24 headcount basis | 18.08 headcount basis | 25.5 headcount basis | 5 |
| 2020s | 18.84 headcount basis | 17.05 headcount basis | 20.69 headcount basis | 6 |
Countries ranked near Thailand
More education data for Thailand
- 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)
- Theoretical duration of lower secondary education (years), annual 0 % change on previous year (2025)
- Theoretical duration of upper secondary education (years), annual 0 % change on previous year (2025)
- Theoretical duration of secondary education (years), annual growth 0 % change on previous year (2025)
- Start of the academic school year (tertiary education), gaps filled 2,023 tertiary education (2024)
- Start of the academic school year (tertiary education), annual growth 0.0495 % change on previous year (2024)
- Primary education, teachers, gaps filled 305,368 (2025)
- Duration of pre primary education, annual growth rate 0 % change on previous year (2025)
- Duration of pre primary education 3 (2025)
Frequently asked questions
- What is pupil-trained teacher ratio in lower secondary education in Thailand?
- Pupil-trained teacher ratio in lower secondary education in Thailand was 18.4 headcount basis in 2025, according to UNESCO Institute for Statistics.
- What is the highest pupil-trained teacher ratio in lower secondary education recorded in Thailand?
- The highest recorded value was 25.5 headcount basis in 2015.
- What is the lowest pupil-trained teacher ratio in lower secondary education recorded in Thailand?
- The lowest recorded value was 17.05 headcount basis in 2020.
- How does Thailand rank for pupil-trained teacher ratio in lower secondary education?
- Thailand ranks 50th out of 87 countries with data for 2025.
- Is pupil-trained teacher ratio in lower secondary education rising or falling in Thailand?
- Over the last ten years it is down 27.9%. 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 Pupil-trained teacher ratio in lower secondary education (headcount basis). Statizoid updates them automatically from the source API.
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CSV · JSON — 11 observations, free to reuse under CC BY-SA 3.0 IGO (UNESCO Institute for Statistics).
About this data
February 2026 Data Release