Washington International School
International School in Washington D.C. area
Quick answer
Washington International School (WIS), founded 1966, serves 900 students from 108 nationalities aged 3 to 18 in the US capital — exceptional diversity rivalling ECOLINT and ISH. The school is an IB Continuum World School (PYP, MYP, DP) with strong French and Spanish bilingual provision. Accredited by IBO, CIS and MSA-CESS. Tuition $33,480-$54,685 per year — premium positioning. Long-established premier choice for diplomatic, World Bank, IMF and embassy expat families.
Key facts
- Curriculum: IB taught at Washington International School.
- Tuition: $33,480–$54,685/yr published in USD, US$ equivalent.
- 108 nationalities top: U.S..
- Ages: Ages 3 to 18 school day starts at 8:15 AM for Middle and Upper School; 8:20 AM for Grades 1-5 and 8:50 AM for Early Years..
- Accreditations: IBO, CIS, MSA-CESS verified.
900
108 (U.S.)
18 max
Rolling
IBO, CIS, MSA-CESS
About Washington International School
Washington International School is an all-gender international day school for students in Preschool through Grade 12.
| Item | Amount |
|---|---|
| Annual tuition (USD) | $33,480 – $54,685 |
| Annual tuition (USD) | 33480-54685 |
| Fee year | 2025-2026 |
| True annual cost (with hidden fees)how we calculate | $45,123(+2%) |
| First-year total (with registration + deposit) | $46,623 |
| Cost position in Washington D.C. area | 100th percentile(premium tier) |
IB
IB Diploma (Grades 11-12) ERBs (Grades 3-8)
High-level IB Diploma results are shared on the WIS website and in the School Profile. WIS students consistently perform well above the world averages.
Spanish, French, Mandarin
WIS practices a variety of differentiation strategies within classrooms.
WIS has learning specialists for all divisions.
Extra support is available for Grades 1-5 French and Spanish students who are not at grade level in their language competency.
8:15 AM for Middle and Upper School; 8:20 AM for Grades 1-5 and 8:50 AM for Early Years. – A little before of after 3:00 PM for all but Grades 11-12. Grades 11-12 may have class until 3:45 PM.
Yes
Options are available but may not stretch to every dietary preference/requirement.
Is Washington International School right for your family?
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At a Glance
Fee Position in Washington D.C. area
PremiumSchool Profile
Student Diversity
Very diverse
Common: U.S.
Estimated Real Cost
Tuition + registration, transport, uniform, exams
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Nearby Schools (within 5km)
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