Education in Chiang Mai, Thailand: official figures
In the 2024 (B.E. 2567) O-NET national tests, Grade 6 students in Chiang Mai averaged Thai 54.4, maths 29.3, science 43.4, English 34.9 (marks out of 100). The national averages were Thai 54.2, maths 29.2, science 42.9, English 33.5. Across the four subjects Chiang Mai averaged 40.5 against 39.9 nationally, ranking 30th highest of 77 provinces.
How well do Grade 9 students in Chiang Mai do in the O-NET exams?
In the 2024 (B.E. 2567) O-NET national tests, Grade 9 students in Chiang Mai averaged Thai 51.7, maths 27.6, science 35.8, English 33.0 (marks out of 100). The national averages were Thai 48.9, maths 26.5, science 34.2, English 30.9. Across the four subjects Chiang Mai averaged 37.0 against 35.2 nationally, ranking 8th highest of 77 provinces.
Source: National Statistical Office of Thailand, from National Institute of Educational Testing Service results · saved copyHow well do Grade 12 students in Chiang Mai do in the O-NET exams?
In the 2024 (B.E. 2567) O-NET national tests, Grade 12 students in Chiang Mai averaged Thai 44.6, maths 22.7, science 29.7, English 31.9, social studies 37.4 (marks out of 100). The national averages were Thai 42.2, maths 21.8, science 29.0, English 30.6, social studies 35.8. Across the five subjects Chiang Mai averaged 33.2 against 31.9 nationally, ranking 20th highest of 77 provinces.
Source: National Statistical Office of Thailand, from National Institute of Educational Testing Service results · saved copyHow many students take the O-NET in Chiang Mai?
17,128 Grade 6, 13,901 Grade 9 and 6,024 Grade 12 students in Chiang Mai sat the Thai-language O-NET test in 2024 (B.E. 2567).
Source: National Statistical Office of Thailand, from National Institute of Educational Testing Service results · saved copyAre school test scores in Chiang Mai improving?
The average O-NET mark in Chiang Mai moved from Grade 6 42.2 to 40.5, Grade 9 36.4 to 37.0 and Grade 12 31.9 to 33.2 between 2023 and 2024 (average of the subject averages; each year's test differs, so compare with caution).
Source: National Statistical Office of Thailand, from National Institute of Educational Testing Service results · saved copyHow good is English in schools in Chiang Mai?
In English, students in Chiang Mai averaged 34.9 in Grade 6, 33.0 in Grade 9 and 31.9 in Grade 12 in the 2024 O-NET; the national averages were 33.5, 30.9 and 30.6.
Source: National Statistical Office of Thailand, from National Institute of Educational Testing Service results · saved copyHow Chiang Mai compares with other provinces
O-NET average mark, Grade 6 (2024 (B.E. 2567))
Chiang Mai ranks 30 of 77, highest first. Unweighted average of the subject averages (Thai, maths, science, English), marks out of 100.
| Rank | Region | O-NET average mark, Grade 6 |
|---|---|---|
| 27 | Ratchaburi | 41.1 |
| 28 | Uttaradit | 40.9 |
| 29 | Songkhla | 40.8 |
| 30 | Chiang Mai | 40.5 |
| 31 | Surin | 40.5 |
| 32 | Phra Nakhon Si Ayutthaya | 40.4 |
| 33 | Krabi | 40.2 |
O-NET average mark, Grade 9 (2024 (B.E. 2567))
Chiang Mai ranks 8 of 77, highest first. Unweighted average of the subject averages (Thai, maths, science, English), marks out of 100.
| Rank | Region | O-NET average mark, Grade 9 |
|---|---|---|
| 5 | Nan | 37.6 |
| 6 | Samut Songkhram | 37.3 |
| 7 | Phayao | 37.2 |
| 8 | Chiang Mai | 37.0 |
| 9 | Pathum Thani | 36.9 |
| 10 | Nonthaburi | 36.9 |
| 11 | Samut Prakan | 36.8 |
O-NET average mark, Grade 12 (2024 (B.E. 2567))
Chiang Mai ranks 20 of 77, highest first. Unweighted average of the subject averages (Thai, maths, science, English and social studies), marks out of 100.
| Rank | Region | O-NET average mark, Grade 12 |
|---|---|---|
| 17 | Samut Prakan | 33.4 |
| 18 | Mukdahan | 33.3 |
| 19 | Nakhon Pathom | 33.3 |
| 20 | Chiang Mai | 33.2 |
| 21 | Prachuap Khiri Khan | 33.2 |
| 22 | Phitsanulok | 33.2 |
| 23 | Pathum Thani | 33.2 |
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Sources
- National Statistical Office of Thailand, from National Institute of Educational Testing Service results: O-NET (Ordinary National Educational Test) average scores and number of candidates by province, Grades 6, 9 and 12, B.E. 2566 and 2567 (2023 and 2024), read 24 October 2026 · saved copy (SHA-256 a3f8bdbd67f1…)
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