| Delegation | SCHOOL |
| Algeria | St Joseph Greek French School |
| Angola | Wesley College, Dublin |
| Argentina | Burntwood |
| Australia | Colegio Ayalde |
| Austria | Rathdown |
| Bahrain | ÅS Videregaende Skole |
| Bangladesh | Habs Girls |
| Barbados | Habs Girls |
| Belgium (SC) | Wesley College, Dublin |
| Bhutan | Ryde Academy |
| Bolivia | First Senior High School of Kifissia |
| Bosnia | St Joseph Greek French School |
| Botswana | St Joseph Greek French School |
| Brazil | Brains Int’l School |
| Bulgaria | Sydenham High School |
| Cambodia | Coláiste Bhaile Chláir |
| Canada | Rathdown |
| Chile | Frankfurt Int’l School |
| China (*SC) | Benenden |
| Congo (Dem Rep) | Habs Boys |
| Congo (Rep) | Coláiste Bhaile Chláir |
| Costa Rica | St Andrew’s, Dublin |
| Cote d’Ivoire (SC) | Terenure College |
| Croatia | St Gerard’s School |
| Cuba | First Senior High School of Kifissia |
| Czech Republic | Lingfield |
| Denmark | HAEF Psychico College |
| Dominican Republic (SC) | Bishop Thomas Grant |
| Egypt | HAEF Psychico College |
| Equatorial Guinea (SC) | ACS Egham |
| Estonia | Terenure College |
| Ethiopia | Terenure College |
| Finland | Rathdown |
| France (*SC) | Santa Margarita Catholic High |
| Georgia | First Middle School of Kifissia |
| Germany (SC) | HAEF Psychico College |
| Greece | Haileybury |
| Iceland | Munabe School |
| India | Frankfurt Int’l School |
| Indonesia (SC) | Shrewsbury |
| Iran | ACS Egham |
| Iraq | Bishop Thomas Grant |
| Ireland | Sydenham High School |
| Israel | Reigate Grammar |
| Italy | Colegio Ayalde |
| Jamaica | Royal Russell School |
| Japan | Habs Girls |
| Jordan | Lingfield College |
| Kazakhstan | Habs Boys |
| Korea (Dem Rep) – North | Haileybury |
| Korea (Rep) – South | Hitachi First High School |
| Kuwait (SC) | American School of Bilbao |
| Latvia | Cheadle Hulme |
| Lithuania | HAEF Psychico College |
| Luxembourg | First Middle School of Kifissia |
| Madagascar | Rathdown |
| Malaysia | St Andrew’s, Dublin |
| Malta | St Andrew’s, Dublin |
| Mexico | St Andrew’s, Dublin |
| Monaco | Cours St Charles |
| Morocco | St Joseph Greek French School |
| Myanmar | American School of Bilbao |
| Netherlands | Cours St Charles |
| New Zealand | Brains Int’l School |
| Nigeria | Bexley Grammar |
| Norway | Cours St Charles |
| Pakistan | Royal Russell School |
| Peru (SC) | First Senior High School of Kifissia |
| Poland (SC) | St Joseph Greek French School |
| Portugal | George Cosbuc High School |
| Russian Federation (*SC) | Habs Boys |
| Saudi Arabia | Sainte Victoire Int’l School |
| Serbia | Santa Margarita Catholic High |
| Singapore | TASIS, England |
| Slovakia | Newpark Comprehensive |
| Slovenia | St Joseph Greek French School |
| Somalia | Frankfurt Int’l School |
| South Africa (SC) | Frankfurt Int’l School |
| Spain | First Middle School of Kifissia |
| Sri Lanka | Benenden |
| Sudan | Sainte Victoire Int’l School |
| Switzerland | Colegio Ayalde |
| Syria | Newpark Comprehensive |
| Tunisia | Frankfurt Int’l School |
| Turkey | American School of Bilbao |
| Uganda | Royal Russell School |
| Ukraine | Gordon’s School |
| United Kingdom (*SC) | St Andrew’s, Dublin |
| Uruguay | Gordon’s School |
| USA (*SC) | Cheadle Hulme |
| Venezuela | Gordon’s School |
| Viet Nam | American School of Bilbao |
| Yemen | St Andrew’s, Dublin |
| Zimbabwe | St Andrew’s, Dublin |
