| | School Name | City | Country | Enrolment |
| The American Academy for Girls | Kuwait city | Kuwait |
830
|
| The Dwight School | New York, NY | United States |
571
|
| Anglo-American School of Moscow | Moscow | Russia |
1250
|
| Anglo-American School of Sofia | Sofia | Bulgaria |
253
|
| Academia Británica Cuscatleca | Santa Tecla | El Salvador |
1400
|
| The American Creativity Academy | | Kuwait |
2300
|
| Adelaide High School | Adelaide, SA | Australia |
1222
|
| Adelaide Secondary School of English | Adelaide, SA | Australia |
413
|
| American International School, Lusaka | Lusaka | Zambia |
496
|
| Aiglon College | Chesières | Switzerland |
360
|
| The American International School of Muscat | Muscat | Oman, Sultanate of |
602
|
| American International School of Budapest | Budapest | Hungary |
802
|
| The International School of Nice | Nice | France |
320
|
| The International School Florence | Florence | Italy |
439
|
| International School of Luxembourg | | Luxembourg |
833
|
| American International School Rotterdam | Rotterdam | Netherlands |
232
|
| American International School Vienna | Vienna | Austria |
788
|
| Zurich International School | Zurich | Switzerland |
1313
|
| Al-Bayan International School | | Kuwait |
1814
|
| International School Hilversum 'Alberdingk Thijm' | Hilversum | Netherlands |
448
|
| Al Nahda International Schools | Abu Dhabi | United Arab Emirates |
4408
|
| American International School - Chennai | Chennai (Madras) | India |
620
|
| Amman Baccalaureate School | Amman | Jordan |
990
|
| American Institute of Monterrey | Monterrey | Mexico |
1302
|
| Colegio Anglo-Colombiano | Bogotá | Colombia |
1672
|
| Annesley College | Wayville, SA | Australia |
526
|
| Antwerp British School | Antwerp | Belgium |
185
|
| Antwerp International School,vzw | Antwerp | Belgium |
553
|
| International School of Aberdeen | Aberdeen | United Kingdom |
490
|
| American International School of Bucharest | Bucharest | Romania |
613
|
| American School in London | London | United Kingdom |
1337
|
| American School of Paris | Paris | France |
790
|
| The American School In Switzerland | Lugano | Switzerland |
521
|
| Atlanta International School | Atlanta, GA | United States |
912
|
| The Awty International School | Houston, TX | United States |
1185
|
| Bangalore International School | Bangalore | India |
270
|
| Bandung International School | Bandung | Indonesia |
244
|
| Bangkok Patana School | Bangkok | Thailand |
2136
|
| Banksia Park International High School | Adelaide, SA | Australia |
692
|
| Batu Hijau International School | Buin Batu, Sumbawa | Indonesia |
28
|
| Bavarian International School | Munich | Germany |
700
|
| Bendigo Senior Secondary College | Bendigo, Victoria | Australia |
1718
|
| Benowa State High School | Benowa, Gold Coast, Qld | Australia |
1592
|
| Benton Junior College | Mornington, Victoria | Australia |
588
|
| International School of Bergen | Bergen | Norway |
200
|
| Berlin Brandenburg International School | Berlin | Germany |
580
|
| Bonn International School e.V. | Bonn | Germany |
570
|
| American School of Bilbao | Bilbao | Spain |
326
|
| Bilkent University Preparatory School/Bilkent International School | Ankara | Turkey |
450
|
| British International School | Jakarta | Indonesia |
1300
|
| Bishop Mackenzie International Schools | Lilongwe | Malawi |
654
|
| Oslo International School | Oslo | Norway |
568
|
| Black Forest Academy | Kandern | Germany |
345
|
| Bordeaux International School | Bordeaux | France |
78
|
| British School of Chicago | Chicago, IL | United States |
429
|
| Brighton Primary School | Victoria | Australia |
749
|
| Brillantmont International School | Lausanne | Switzerland |
140
|
| The British School, New Delhi | New Delhi | India |
608
|
| Brookhouse International School | Nairobi | Kenya |
500
|
| The British School of Brussels | Brussels | Belgium |
1245
|
| British School, Caracas | Caracas | Venezuela |
240
|
| The British School of Costa Rica | San José | Costa Rica |
908
|
| The British School, Rio de Janeiro | Rio de Janeiro | Brazil |
1584
|
| Özel Büyük Kolej | Ankara | Turkey |
979
|
| Cambridge Primary School | Melbourne | Australia |
628
|
| Carey Baptist Grammar School | Melbourne, Victoria | Australia |
2286
|
| Caroline Springs College | Melbourne, Vic | Australia |
2388
|
| Caulfield Junior College | Melbourne | Australia |
393
|
| Cebu International School | Cebu City | Philippines |
464
|
| Cedar International School | Tortola | British Virgin Islands |
259
|
| Chinese International School, Hong Kong | Hong Kong (SAR) | China |
1410
|
| Copenhagen International School | Copenhagen | Denmark |
600
|
| Cleveland District State High School | Cleveland, Qld | Australia |
1078
|
| Collège Alpin Beau Soleil | Villars-sur-Ollon | Switzerland |
185
|
| Colegio Columbia | Tampico | Mexico |
864
|
| Colegio Inglés | Monterrey | Mexico |
1678
|
| Colegio Gran Bretaña | Bogotá | Colombia |
276
|
| Collège Du Léman International School | Geneva | Switzerland |
1952
|
| Collingwood College | Victoria 3067 | Australia |
556
|
| Colegio Los Nogales | Bogotá | Colombia |
936
|
| International School of Lausanne | Lausanne | Switzerland |
608
|
| Concordian International School | Bangkok | Thailand |
361
|
| Craigslea State High School | Qld | Australia |
812
|
| Dubai American Academy | Dubai | United Arab Emirates |
2150
|
| International School Dakar | Dakar | Senegal |
320
|
| Dasman Model School | | Kuwait |
1060
|
| American International School/Dhaka | Dhaka | Bangladesh |
693
|
| International School, Dhaka | Dhaka | Bangladesh |
579
|
| British International School, Phuket | Phuket | Thailand |
905
|
| Ecole Internationale de Boston / International School of Boston | Boston, MA | United States |
500
|
| El Gouna International School | Red Sea | Egypt |
155
|
| The English Academy | Kuwait | Kuwait |
1000
|
| Escuela Campo Alegre | Caracas | Venezuela |
619
|
| Eyüboğlu Schools | Istanbul | Turkey |
2161
|
| Foundation of The Int'l School of Geneva | Geneva | Switzerland |
4060
|
| International School of Geneva (La Grande Boissière) | Geneva | Switzerland |
1927
|
| International School of Geneva (La Châtaigneraie) | Geneva | Switzerland |
1168
|
| International School of Geneva (Campus des Nations) | Geneva | Switzerland |
965
|
| Flora Hill Secondary College | Bendigo, Victoria | Australia |
1117
|
| Franconian International School | Erlangen | Germany |
396
|
| Frankfurt International School (FIS) / International School Wiesbaden (ISW) | Frankfurt | Germany |
1858
|
| French American International School | San Francisco, CA | United States |
945
|
| Garden International School | Kuala Lumpur | Malaysia |
1964
|
| Ghana International School | Accra | Ghana |
1142
|
| American School of The Hague | The Hague | Netherlands |
1100
|
| Harare International School | Harare | Zimbabwe |
452
|
| Harristown State High School | Toowoomba, Qld | Australia |
1489
|
| Harrow International School | Bangkok | Thailand |
1221
|
| International School of Havana | Havana | Cuba |
220
|
| New Cairo British International School | Cairo | Egypt |
650
|
| Hiroshima International School | Hiroshima | Japan |
150
|
| Hisar Educational Foundation Schools | Istanbul | Turkey |
1094
|
| Hong Lok Yuen International School | Hong Kong (SAR) | China |
360
|
| International School of Hyderabad | Hyderabad | India |
174
|
| Prem Tinsulanonda International School | Chiang Mai | Thailand |
466
|
| International Community School, Abuja | Abuja | Nigeria |
253
|
| International College Spain | Madrid | Spain |
682
|
| The Inter-Community School Zurich | Zürich | Switzerland |
831
|
| International School of Estonia | Tallinn | Estonia |
122
|
| International School of Monterey | Monterey, CA | United States |
385
|
| Indooroopilly State High School | Indooroopilly | Australia |
918
|
| The International School of Monaco | Monte Carlo | Monaco |
380
|
| International College, Beirut | Beirut | Lebanon |
3349
|
| International Preparatory School | Mapou | Mauritius |
331
|
| International Community School of Abidjan | Abidjan | Côte D'Ivoire |
44
|
| International School of Amsterdam | Amsterdam | Netherlands |
905
|
| The International School of Azerbaijan, Baku (AIOC-TISA) | Baku | Azerbaijan |
519
|
| International School of the Basel Region (AG) | Basel | Switzerland |
1107
|
| International School of Beijing | Beijing | China |
1936
|
| International School of Belgrade | Belgrade | Serbia |
353
|
| International School of Berne | Berne | Switzerland |
285
|
| International School Brunei | Bandar Seri Begawan | Brunei Darussalam |
923
|
| International School of Brussels | Brussels | Belgium |
1476
|
| International School of the Sacred Heart | Tokyo | Japan |
604
|
| International School of Düsseldorf e.V. | Dusseldorf | Germany |
950
|
| International Secondary School Eindhoven | Eindhoven | Netherlands |
255
|
| International School Eerde | Ommen | Netherlands |
129
|
| The International School of the Gothenburg Region | Gothenburg | Sweden |
838
|
| International School Hamburg | Hamburg | Germany |
650
|
| International School of Helsinki | Helsinki | Finland |
296
|
| International School, Ho Chi Minh City | Ho Chi Minh City | Vietnam |
980
|
| International School of Latvia | Jurmala | Latvia |
215
|
| International School of London | London | United Kingdom |
338
|
| The International School of Lusaka | Lusaka | Zambia |
667
|
| International School, Manila | Manila | Philippines |
1850
|
| The International School of Naples | Naples | Italy |
293
|
| International School of Paris | Paris | France |
652
|
| International School of Phnom Penh | Phnom Penh | Cambodia |
516
|
| International School of Prague | Prague | Czech Republic |
780
|
| International School of Busan | Busan | Korea, South |
215
|
| Sotogrande International School | Sotogrande | Spain |
680
|
| Stockholm International School | Stockholm | Sweden |
420
|
| Istanbul International Community School | Istanbul | Turkey |
468
|
| International School of Tanganyika | Dar es Salaam | Tanzania |
930
|
| International School of Turin (ACAT) | Turin | Italy |
365
|
| Jakarta International School | Jakarta | Indonesia |
2474
|
| Aoba - Japan International School | Tokyo | Japan |
435
|
| St John's International School | Waterloo | Belgium |
920
|
| Kampala International School | Kampala | Uganda |
330
|
| Kawana Waters State College | Victoria | Australia |
966
|
| Kedron State High School | Wooloowin , Qld | Australia |
1016
|
| Kenmore State High School | Brisbane | Australia |
1620
|
| International School of Kenya | Nairobi | Kenya |
655
|
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