The table below shows a list of South Australia's 20 largest schools by enrolment size.
This student enrolment information is based on the 2005-2007 student census.[1]
| No. | School | Student Enrolments |
|---|---|---|
| 1. | Trinity College Gawler | 3,395 |
| 2. | Hamilton Secondary College | 1,867 |
| 3. | Pembroke School | 1,454 |
| 4. | Norwood Morialta High School | 1,416 |
| 5. | St John's Grammar School | 1,300 |
| 6. | Saint Ignatius' College | 1,300 |
| 7. | Charles Campbell Secondary School | 1,278 |
| 8. | Glenunga International High School | 1,265 |
| 9. | Marryatville High School | 1,265 |
| 10. | Brighton Secondary School | 1,259 |
| 11. | Golden Grove High School | 1,212 |
| 12. | Unley High School | 1,208 |
| 13. | The Heights School | 1,199 |
| 14. | Adelaide High School | 1,177 |
| 15. | Christies Beach High School | 1,161 |
| 16. | Paralowie R-12 School | 1,159 |
| 17. | St Peter's College | 1,150 |
| 18. | Eastern Fleurieu R-12 School | 1,164 |
| 19. | Rostrevor College | 1,110 |
| 20. | Aberfoyle Park High School | 1,104 |
Information was obtained from Department of Education and Children's services, SA, School websites and Wikipedia School information entries.[1]