This report lists the winners of Certificates of Distinction and Certificates of Merit for 2018, along with the school that they attended.
These certificates are awarded to students who achieve at least 150 points (Certificate of Merit) or 190 points (Certificate of Distinction) across 20 year 11 and year 12 course units or equivalents, of which 10 are at year 12 level.
Formerly these awards were named Certificates of Commendation (2012-2015) or Certificates of Excellence (prior to 2012), and were based on achievements of at least 20 'A' grades in course units or equivalents.
| 1 | Cert of Distinction | AAKERMANN, CARINA | Presbyterian Ladies College | Peppermint Grove |
| 2 | Cert of Distinction | ABBOTT, VINCENT | Hale School | Wembley Downs |
| 3 | Cert of Distinction | ABEYSINGHE, SAHAN | Perth Modern School | Subiaco |
| 4 | Cert of Distinction | ABRAHAMS, JORDAN JAMES | Kent Street Senior High School | East Vic Park |
| 5 | Cert of Distinction | ACOSTA VARGAS, ANDREA | St Marys Anglican Girls School | Karrinyup |
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| 6 | Cert of Distinction | ADAMS, OLIVIA | Perth College | Mount Lawley |
| 7 | Cert of Distinction | AGENBACH, RETHA | John Curtin College of the Arts | Fremantle |
| 8 | Cert of Distinction | AGGARWAL, MEHUL | Perth Modern School | Subiaco |
| 9 | Cert of Distinction | AHMAD, HAIRUL | Hale School | Wembley Downs |
| 10 | Cert of Distinction | AHMADI, FATIMAH | Australian Islamic College Kewdale | Kewdale |
| 11 | Cert of Distinction | AHMED, MUBASHSHIRA | Willetton Senior High School | Willetton |
| 12 | Cert of Distinction | AHO, LIANA SOPHY | Perth Modern School | Subiaco |
| 13 | Cert of Distinction | AI, JIEMIN | Hale School | Wembley Downs |
| 14 | Cert of Distinction | AINKARAN, SUVEDINI | Rossmoyne Senior High School | Rossmoyne |
| 15 | Cert of Distinction | ALAM, ANNEKA | Rossmoyne Senior High School | Rossmoyne |
| 16 | Cert of Distinction | ALEXANDER, AMY | St Marys Anglican Girls School | Karrinyup |
| 17 | Cert of Distinction | ALEXANDER, KANE | Churchlands Senior High School | Churchlands |
| 18 | Cert of Distinction | ALGAR, JESSICA | Methodist Ladies College | Claremont |
| 19 | Cert of Distinction | ALIBANG, SAMANTHA RHAE | Applecross Senior High School | Ardross |
| 20 | Cert of Distinction | ALLAN, JESSICA | St Hildas Anglican School for Girls | Mosman Park |
| 21 | Cert of Distinction | ALLEN, ALYSSA | Mercedes College | Perth |
| 22 | Cert of Distinction | ALLEN, DYLAN ANTHONY | Leeming Senior High School | Leeming |
| 23 | Cert of Distinction | ALLERDING, OLIVIA | John XXIII College | Mount Claremont |
| 24 | Cert of Distinction | AMBROSE, MARIA SMRITI NEENA | Willetton Senior High School | Willetton |
| 25 | Cert of Distinction | ANDERSON, BENJAMIN | Wesley College | South Perth |