As a world-class, accredited private school in Cambridge, MA, serving nearly 580 students from age 2 through Grade 12, the International School of Boston (ISB) places the development of the bilingual brain at the heart of our mission.
Quick Stats (2025)
- Top Ranked MA School
- School Type: School with Special Program Emphasis
- Grades: Nursery/Preschool-12
- Enrollment: 579 students
- Yearly Tuition: $46,060
- Average class size: 14 students
- Application Deadline: Feb. 15 / rolling
- Source: Verified school update
Top Rankings
International School Of Boston ranks among the top 20% of private schools in Massachusetts for:
School Overview
School Type
Religious Affiliation
Grades Offered
Grades Nursery/Preschool-12
Year Founded
1962
Summer School Offered
Yes
Summer Program Details
School Calendar
First Day of School
Fri. Aug 1, 2025
Last Day of School
Mon. May 25, 2026
Student Body
Total Students
579 students
Student Body Type
Co-ed
% Students of Color
12%
State avg.: 29%
Students by Grade
Academics and Faculty
Total Classroom Teachers
93 teachers
Student : Teacher Ratio
6:1
National avg.: 13:1
% Faculty w/Advanced Degree
80%
Average Class Size
14 students
List of Courses Offered
Matriculation DataMatric. Data
Classroom Dress Code
Casual
Tuition and Acceptance Rate
Admission Deadline
Feb. 15 / rolling
Yearly Tuition Cost
$46,060
Tuition Notes
Tuition between $26,510 and $46,060
% on Financial Aid
23%
Admissions Director
Lucy Pelham
Admissions Associate
Elisabeth Geffray
Application URL
Sports
Total Sports Offered
4 sports
Sports
Extracurriculars
Total ExtracurricularsTotal Extra-curric.
56 extracurriculars
ExtracurricularsExtra-curric.
Club or Organization:
Arabic, Archery, Art, Astronomy, Badminton, Ballet, Basketball, BioBuilder, Botany, Chess, Chorus and Select Singers, Club Philo, Coding, Computer Science, Cooking, Dance, Digital Art, Discover of Music, Eco, Entrepreneurship, Farsi, Fashion Illustration, Fencing, Film, Finance, Girls Who Code, ISB Radio, Jazz / Rock Band, Karate, Legos, Life Art, Mandarin, Marine Biology, Math, Math Games, Math Olympiad, Meteorology, Model United Nations Team, Movie Making, Private Music Instruction, Sailing, Soccer, Social Action, Spanish Conversation & Games, STEM, Storytelling and Creative Writing, Student Ambassadors, Student Council, Swimming, Tennis, Theater Company, Ultimate Frisbee, Watercolors, Weird Science, Yearbook Club, Yoga
Arabic, Archery, Art, Astronomy, Badminton, Ballet, Basketball, BioBuilder, Botany, Chess, Chorus and Select Singers, Club Philo, Coding, Computer Science, Cooking, Dance, Digital Art, Discover of Music, Eco, Entrepreneurship, Farsi, Fashion Illustration, Fencing, Film, Finance, Girls Who Code, ISB Radio, Jazz / Rock Band, Karate, Legos, Life Art, Mandarin, Marine Biology, Math, Math Games, Math Olympiad, Meteorology, Model United Nations Team, Movie Making, Private Music Instruction, Sailing, Soccer, Social Action, Spanish Conversation & Games, STEM, Storytelling and Creative Writing, Student Ambassadors, Student Council, Swimming, Tennis, Theater Company, Ultimate Frisbee, Watercolors, Weird Science, Yearbook Club, Yoga
School Notes
- School Mascot: Volt The Blue Terrier
- As a world-class, accredited private school in Cambridge, MA, serving nearly 580 students from age 2 through Grade 12, the International School of Boston (ISB) places the development of the bilingual brain at the heart of our mission.
- ISB students graduate with an American high school diploma and have the option to choose between two internationally renowned diplomas: the French Baccalaureate or the International Baccalaureate (IB). This allows them to thrive at leading universities in the United States, France, and worldwide.
- At ISB, equipping students with the ability to speak multiple languages fluently and to develop critical thinking skills within the context of international mindedness is a purposeful, daily experience. Moreover, our vast array of co-curricular activities in the arts, athletics, and our Global Learning Program underscore our holistic approach to student development and our commitment to preparing our students to be part of something bigger than themselves.
- The ISB priority application deadline is February 15. There is no fee to apply, and need-based financial aid is available. No prior knowledge of French, Chinese, or Spanish is required for admission.
Source: Verified school update
Frequently Asked Questions
How much does International School Of Boston cost?
International School Of Boston's tuition is approximately $46,060 for private students.
Does International School Of Boston offer a summer program?
Yes, International School Of Boston offers a summer program. Visit their summer school page for more information.
What sports does International School Of Boston offer?
International School Of Boston offers 4 interscholastic sports: Basketball, Fencing, Soccer and Volleyball.
What is International School Of Boston's ranking?
International School Of Boston ranks among the top 20% of private schools in Massachusetts for: Largest student body and Most extracurriculars offered.
When is the application deadline for International School Of Boston?
The application deadline for International School Of Boston is Feb. 15 / rolling (applications are due on Feb. 15 but additional applications are reviewed year-round as space permits ).
Related Schools
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People that viewed International School Of Boston also viewed these schools: Buckingham Browne & Nichols School, Shady Hill School, Cambridge Friends School, Fayerweather Street School and German International School Boston.
The nearest high school to International School Of Boston is The Cambridge Matignon School (0.1 miles away)
The nearest elementary school is Lesley Ellis School (0.6 miles away)
The nearest preschool is Tufts Educational Daycare Center (0.4 miles away)
Show me:
Show me:
School
Location
Miles
Grades
Students
Grades: PK-12 | 1,048 students 2.1 miles 80 Gerry's Landing Rd
Cambridge, MA 02138
(617) 547-6100
Cambridge, MA 02138
(617) 547-6100
2.1
PK-12
1,048
Grades: PK-8 | 531 students 2.1 miles 178 Coolidge Hill
Cambridge, MA 02138
(617) 520-5200
Cambridge, MA 02138
(617) 520-5200
2.1
PK-8
531
Grades: PK-8 | 140 students 1 miles 5 Cadbury Road
Cambridge, MA 02140
(617) 354-3880
Cambridge, MA 02140
(617) 354-3880
1
PK-8
140
Grades: PK-8 | 205 students 1.3 miles 765 Concord Avenue
Cambridge, MA 02138
(617) 876-4746
Cambridge, MA 02138
(617) 876-4746
1.3
PK-8
205
Grades: PK-12 | 304 students 2.9 miles 57 Holton Street
Allston, MA 02134
(617) 783-2600
Allston, MA 02134
(617) 783-2600
2.9
PK-12
304
School Reviews
5 1/19/2022
Parent of a twelfth grader. We're getting nostalgic already but are so excited for our son who has just been admitted ED to Columbia. Amazingly diverse student body and faculty. Small classes but with a lot of individualized focus on students. Emphasis on student independence which we know will benefit him in NYC next year. I've heard admissions is getting increasingly competitive. We're thankful our son could get it when he did so many years ago!
5 10/9/2020
We've been with ISB for several years now and my daughter is so happy with the program and with her friends. Teachers are amazing, dedicated, well-educated and really care about their students. Love the emphasis on building empathy and valuing the diversity of perspective. She is in middle school now and we plan to stay for the IB program in the upper school.
5 2/28/2020
We've been with ISB for several years now. One child in middle school, the other in upper school. We were previously happy with the school but are even happier now with the recent change in leadership. Our children have thrived at ISB. They come from an English-speaking home, so the opportunity to connect them with another language and with a more globally focused curriculum and internationally diverse student community has been amazing.
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