Oeiras International School

Portugal, Lisbon

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The school at a glance

Instructs in English

Fees €14,962 - 24,844

Ages 6 - 18 years

Pupil numbers 463

Type Co-educational

Opened 2010

Bus Service Yes

Oeiras International School (OIS) is a non-profit, parent-founded International Baccalaureate World School offering a full IB Continuum for ages 6 to 18. The curriculum spans the Primary Years Programme (PYP) for ages 6 to 10, the Middle Years Programme (MYP) for ages 11 to 16, and the Diploma Programme (DP) for ages 17 to 18. The school is housed on the Quinta de Nossa Senhora da Conceição estate in Barcarena, Oeiras, a historic 17th‑century property with riverine and woodland spaces that support hands‑on learning. Facilities include the Palace library, science labs, art and music rooms, classrooms in the Pavilion and White/Orange Building, and on‑site sports amenities such as a swimming pool, basketball court, football pitch, and a multisport pavilion. The campus also runs social projects from its garden farms and offers diverse co‑curriculars, languages, MUN, and the Duke of Edinburgh award. Students graduate ready for university admissions and global citizenship.

Academic offering

Curriculum IB (PYP), IB (MYP), IB (DP)

Taught languages Portuguese, English, German, French, Spanish, Mandarin

Typical class size 16

Strengths Sport, Visual and Creative Arts, Languages

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

Stages Primary School, Secondary School, Sixth Form

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