| Colombo International School, කොළඹ ජාත්යන්තර පාසල, கொழும்பு சர்வதேச பள்ளி | |
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| Address | |
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R.G Senanayake Mawatha, Colombo 7 Sri Lanka | |
| Coordinates | 6°54′31.9″N 79°52′15.6″E / 6.908861°N 79.871000°E |
| Information | |
| Type | Co-educational private school |
| Religious affiliation(s) | Secular |
| Established | 1982 |
| Founder | Elizabeth Moir Tenduf-La |
| Principal | Sarah Philipps (2018-present) |
| Gender | Co-educational |
| Age range | 2-18 |
| Language | English, Sinhala, Tamil |
| Campus size | ~10,000m² |
| Color(s) | Red and white |
| Chairman | Armyne Wirasinha |
| Enrollment (Main branch) | ~1900 |
| Enrollment (Kandy branch) | ~700 |
| Website | www |
Colombo International School (CIS) is a private co-educational school in Colombo, Sri Lanka. It was founded in 1982 by Elizabeth Moir and employs an English-medium curriculum.
In 1998 the school was expanded by the new Chairman of the Board of Directors, Armyne Wirasinha, who created a new branch, Colombo International School Kandy, in Mawilmada.
The school provides a British curriculum-based education system which includes the IGCSE Examination for grades 10 and 11 and International Advanced Level for 6th form.