Seoul International School

South Korea, Seoul

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The school at a glance

Instructs in English

Fees ₩31,991,809 - 39,374,690

Ages 3 - 18 years

Pupil numbers 802

Type Co-educational

Opened 1973

Bus Service Yes

Seoul International School (SIS) is a PreK–12 school in Seongnam, Gyeonggi-do, serving international students in the Seoul area. Founded in 1973, SIS provides an American curriculum and offers Advanced Placement (AP) courses in high school. The school’s 2024–2025 High School Profile lists a total PreK–12 enrollment of 802 students. Class sizes are capped at 20 students in Pre-K through Senior Kindergarten, up to 23 students in grades 1–8 and high school classes typically range from 8 to 25 students depending on the course. Students can join activities such as Model United Nations, Science Club, Math Club, Coding club, Student Council and National Honor Societies. SIS also describes a music program that includes ensembles and Suzuki violin beginning in Junior Kindergarten.

Academic offering

Curriculum American Curriculum

Taught languages Mandarin, Spanish

Typical class size 15

Strengths Sport, Performing Arts, STEM

Clubs Academic and Intellectual, Arts and Creative, Community and Service, Leadership and Professional

Stages Preschool, Kindergarten, Elementary, Middle School, High School

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