Surabaya International School (SIS)

Surabaya International School (SIS) is the longest-established international school in East Java, founded in 1971 to serve the city's expatriate business and diplomatic community. Located in the heart of Surabaya on Jalan Profesor Moestopo, SIS offers an American-style English-medium education from Kindergarten through to Grade 12, leading to the US high school diploma with a selection of AP courses at the senior level.

SIS is the natural first choice for families relocating to Surabaya for business, particularly those in the manufacturing, energy, and agribusiness sectors that anchor East Java's economy. Class sizes are small, the school community is tight-knit, and the quality of faculty is high relative to the modest fee level. SIS is WASC-accredited, reflecting its long history of meeting internationally recognised academic standards.

Surabaya's international school sector is smaller than Jakarta's, and SIS occupies a central place in the city's expat life more broadly — the school is a social hub as well as an academic one. Families who have lived in Surabaya frequently cite the quality of the SIS community and the lower cost of living compared to Jakarta as major advantages of choosing Indonesia's second city as a base.