ISS International School

Alexandra Singapore

Full IB (PYP, MYP, DP)
International
Ages 4 - 18

Indicative annual tuition

SGD 32,400 – 56,700

Mid-range fees for Singapore

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Indicative figures from the school's most recent published fees. They vary by year group and extras; confirm current fees with the school before applying.

Curriculum: Full IB (PYP, MYP, DP)
Ages: 4 - 18
Type: International
Languages: English, French, Spanish, Mandarin
Area: Alexandra
Address: 21 Preston Road, Singapore 109355

Last updated 27 September 2026 One of 17 schools we list in Singapore

About ISS International School

ISS International School is Singapore's oldest IB school, authorised for all three student-facing IB programmes — PYP, MYP, and Diploma — since the earliest days of the IB organisation. Founded in 1981, ISS has built nearly five decades of IB expertise, and this depth of institutional knowledge is reflected in consistently strong student outcomes and a faculty deeply versed in the IB philosophy and assessment framework.

Located in Alexandra, just minutes from the CBD and easily accessible from Queenstown, Buona Vista, and Harbourfront, ISS occupies a prime central-south position that appeals to families living in or near the city. The school is smaller than many Singapore international schools, with a total enrolment of around 600 students — a deliberate choice that enables a highly personalised educational experience and close relationships between teachers, students, and families.

ISS is particularly noted for its strong arts programme, its committed international-mindedness, and its ability to successfully integrate students arriving mid-year from diverse educational backgrounds. The school's IB Diploma results are consistently impressive, and graduates proceed to universities across the world including top institutions in the US, UK, Switzerland, and Asia. For families seeking a boutique, deeply IB-committed school in a central location, ISS International School is among Singapore's finest options.

Facilities and campus

Sports Hall
Science Labs
Arts Centre
Library
Music Rooms
Student Lounge
Outdoor Terrace
Design Studios

Accreditations and memberships

As listed by the school. Check with the accrediting body if it matters for your decision.

IB
CIS
WASC

Location and contact

ISS International School

21 Preston Road, Singapore 109355

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Questions parents ask

ISS International School follows the Full IB (PYP, MYP, DP) curriculum, catering to students aged 4 - 18.

Indicative annual tuition at ISS International School is SGD 32,400 - 56,700, based on the most recent published figures. Fees vary by grade level and additional services — confirm current fees with the school before applying.

ISS International School is located at 21 Preston Road, Singapore 109355, in the Alexandra area of Singapore.

You can request information about ISS International School's admission process by filling out the inquiry form on this page. Our team will connect you with the school's admissions office.