Key facts
| Address | 29 Moo 10, Surasak, Sriracha, Chonburi |
| Founded | 1944 — a Catholic-run Thai day school, part of the Assumption network |
| Enrollment | Roughly 4,200 students, predominantly boys, Kindergarten 1 through Mathayom 6 — the grade range is confirmed by the school's own FAQ; the headcount is attested by third-party sources and not published by the school |
| Curriculum | Thai national curriculum. English-medium streams: Modern Language Program at primary, Special English Program and Integrated English Program through Mathayom 3. Upper secondary (M4–M6) runs Thai-curriculum tracks with English, Chinese and Japanese language options |
| Boarding | Yes — boys from any grade, girls from Mathayom 1. Around fifty in-school dormitory places, plus teacher-run dormitories off campus |
| Fees | BAANLYY does not publish per-school tuition figures — they are revised annually. Request the current schedule directly from the school |
| Official website | acs.ac.th |
Overview
Assumption College Sriracha is the largest school on Thailand's Eastern Seaboard — a Catholic day-and-boarding school founded in 1944, one of the fourteen schools of the Saint Gabriel's Foundation of Thailand, educating a reported 4,200 students from Kindergarten 1 through Mathayom 6. The Brothers moved to Sriracha in November 1942 after the Bangkok campus was damaged by bombing, and teaching began here in 1944. English-medium provision runs deeper than this page previously said: the Modern Language Program at primary, the Special English Program and Integrated English Program through Mathayom 3, and English-language tracks continuing to Mathayom 6. It is not an international school and should not be shortlisted as one — the leaving qualification is the Thai Mathayom 6 certificate — but for a family staying several years it delivers genuine immersion at a fraction of international pricing, and it is the only school in the Chonburi corridor that boards. BAANLYY is not affiliated with ACS and takes no paid placement in this guide; confirm all figures directly with the school.
Who it's for
ACS suits families on a tighter relocation budget who want real English-medium instruction and are comfortable with a large, Thai-integrated school rather than a small international campus. The English Programme has limited seats each year and typically fills ahead of the Term 1 intake, so apply as early as your relocation timeline allows. Families wanting a fully international, English-only environment through Grade 12 should instead look at the International School of the Eastern Seaboard (ISE) in nearby Bo Win.
Location & getting there
ACS sits in Surasak, Sriracha — in the heart of Chonburi's corporate and industrial community, close to Bangkok Hospital Sriracha and a deep supply of serviced apartments and condos aimed at relocating professionals. Chonburi's industrial corridor has no rail system, so most families drive.
FAQ
What English-medium programmes does Assumption College Sriracha run?
Three, at different stages. At primary level the Modern Language Program (MLP) is the English-medium stream. At lower secondary, ACS runs both the Special English Program (SEP) and the Integrated English Program (IEP), and the school's own IEP materials are published for Mathayom 1 to Mathayom 3 — so the English-medium provision runs through M3, not through M2 as this page previously stated. At upper secondary (Mathayom 4-6) the tracks are Thai-curriculum tracks — Gifted Science, Science-Mathematics, Arts-Calculation and an Arts-Language track offering English, Chinese and Japanese — rather than a continuation of SEP or IEP. Ask which specific stream your child would enter and how many periods a week are genuinely taught in English.
Does ACS offer boarding?
Yes, and this is unusual in the Sriracha corridor — no other school on our Chonburi guide boards. The school's own FAQ sets out the rule: boys may board from any grade, girls only from Mathayom 1 upward. In-school dormitory capacity is around fifty across four large and two small buildings, supplemented by teacher-run dormitories off campus. Confirm which of the two you would be offered, because they are not the same arrangement.
How big is ACS?
Founded in 1944, Assumption College Sriracha is the largest school on Thailand's Eastern Seaboard, educating roughly 4,200 students — predominantly boys — from Kindergarten through Mathayom 6 (Grade 12).
Is ACS a Catholic school?
Yes — ACS is a Catholic-run Thai day school, part of the Assumption network of schools founded by the Brothers of St. Gabriel, though it enrolls students of all faiths.
Where is ACS located and who is it for?
ACS sits at Surasak, Sriracha, Chonburi — central to the Sriracha industrial corridor. It suits families who want genuine English-medium instruction without full international-school pricing, and are comfortable in a large, Thai-integrated school environment rather than a small international campus.
Sources & References
- Ministry of Education, Thailand
- Assumption College Sriracha — Wikipedia
- Assumption College Sriracha — official site
School facts are drawn from the school's own official website and independently verified public sources. BAANLYY is not affiliated with ACS and takes no paid placement in this content — always confirm current fees, admissions and campus details directly with the school.
See the full Chonburi schools guide for how ACS compares with the corridor's other schools.
