This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2018, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 745 | O'CONNOR, Lacey | SA | Merit | Essential English | |
| 746 | O'DWYER, Corey | SA | Merit | Research Project B | |
| 747 | OATES, Thomas | SA | Merit | Mathematical Methods | |
| 748 | OATS, Zachary | SA | Merit | Research Project B | |
| 749 | OBORN, Cooper Dene | SA | Merit | Research Project B | |
| 750 | OBST, Emily Mae | SA | Merit | Research Project B | |
| 751 | OLIVER, Brooke | SA | Merit | Modern History | |
| 752 | OLSSON, Tylor Jade | SA | Merit | Research Project B | |
| 753 | OSBORN, Amelia Rose | SA | Merit | Legal Studies | |
| 754 | OTHMAN, Rola | SA | Merit | English | |
| |
|||||
| 755 | OTTAVIANO, Sabrina | SA | Merit | Essential Mathematics | |
| 756 | OTTERSPOOR, Emily May | SA | Merit | Health | |
| 757 | OVERALL, Jack Benjamin | SA | Merit | Composing and Arranging | |
| 758 | OVERALL, Jack Benjamin | SA | Merit | Musical Styles | |
| 759 | OVERALL, Jack Benjamin | SA | Merit | Musicianship | |
| 760 | OXLEY, Ashleigh Anne | SA | Merit | Workplace Practices | |
| 761 | PACKER, Maisie Renate | SA | Merit | Tourism | |
| 762 | PAGONIS, Ioannis (Yianni) | SA | Merit | Modern Greek (Continuers) | |
| 763 | PAK POY, Lucinda Sofia | SA | Merit | Physical Education | |
| 764 | PALA, Stefano Roberto | SA | Merit | Research Project B | |
| 765 | PALADINO, Jye Antonio | SA | Merit | Research Project B | |
| 766 | PALM, Lucy Naomi | SA | Merit | English | |
| 767 | PALMER, Aspen Brinn | SA | Merit | Dance | |
| 768 | PALMER, Louise Claire Anne | SA | Merit | Creative Arts | |
| 769 | PALMER, Louise Claire Anne | SA | Merit | Health | |
| 770 | PALUSHAJ, Denis | SA | Merit | Psychology | |
| 771 | PALUSHAJ, Denis | SA | Merit | Scientific Studies | |
| 772 | PANAHKHAHI, Mahya | SA | Merit | English | |
| 773 | PANAHKHAHI, Mahya | SA | Merit | Legal Studies | |
| 774 | PAPAGNI, Olivia | SA | Merit | Modern History | |
| 775 | PAPAGNI, Olivia | SA | Merit | Research Project B | |
| 776 | PAPANDREA, Alessandro | SA | Merit | Biology | |
| 777 | PARK, Mir | SA | Merit | Japanese (Continuers) | |
| 778 | PARK, Seoan (Stephanie) | SA | Merit | Biology | |
| 779 | PARK, Seoan (Stephanie) | SA | Merit | Mathematical Methods | |
| 780 | PARK, Seoan (Stephanie) | SA | Merit | Specialist Mathematics | |
| 781 | PARK, Yunmi | SA | Merit | Korean (Continuers) | |
| 782 | PARK, Yunmi | SA | Merit | Research Project B | |
| 783 | PARKER, Clayton James | SA | Merit | Mathematical Methods | |
| 784 | PARKER, Clayton James | SA | Merit | Physics | |
| 785 | PARKER, Taylah | SA | Merit | General Mathematics | |
| 786 | PARTINGTON, Shae-Lea | SA | Merit | Workplace Practices | |
| 787 | PASFIELD, Annaliese Rose | SA | Merit | Communication and the Community | |
| 788 | PATE, Lauren Hannah | SA | Merit | Integrated Learning B | |
| 789 | PATI, Anuradha | SA | Merit | Chemistry | |
| 790 | PATI, Anuradha | SA | Merit | English Literary Studies | |
| 791 | PATSOURIS, Anastasia Catherine | SA | Merit | Visual Arts - Design | |
| 792 | PAUL, Jackson | SA | Merit | Business and Enterprise | |
| 793 | PEARSONS, Mitchell Luke | SA | Merit | Research Project B | |
| 794 | PEDICINI, Ruby Simona | SA | Merit | Research Project B | |