| School Name | Country | Region |
|---|---|---|
| The Scindia School | India | South Asia and the Gulf |
| The Shri Ram School | India | South Asia and the Gulf |
| The Shri Ram School, Moulsari | South Asia and the Gulf | |
| The Southport School | Australia | Australasia and East Asia |
| Thomas More College | South Africa | Africa |
| Tiger Kloof Educational Institution | South Africa | Africa |
| Transylvania College | Romania | Europe and the Mediterranean |
| Trevor Day School | United States | Americas |
| Trinity Anglican School | Australia | Australasia and East Asia |
| Trivandrum International School | India | South Asia and the Gulf |
