This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2003, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 692 | Levy, Gabriel | SA | Merit | Music Individual Study | |
| 693 | Lewis, Zoe Aasta | SA | Merit | Geography Studies | |
| 694 | Li, Duo | SA | Merit | Mathematical Studies | |
| 695 | Li, Duo | SA | Merit | Specialist Mathematics | |
| 696 | Li, Lin Lin | SA | Merit | Mathematical Studies | |
| 697 | Li, Xin | SA | Merit | Mathematical Methods | |
| 698 | Liddicoat, Joel Dennis | SA | Merit | Music Individual Study | |
| 699 | Liensavanh, Anouvong | SA | Merit | Solo Performance | |
| 700 | Liew, Ellise Danielle | SA | Merit | English Communications | |
| 701 | Liew, Ellise Danielle | SA | Merit | Geography Studies | |
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| 702 | Lim, Michelle | SA | Merit | Chemistry | |
| 703 | Lim, Michelle | SA | Merit | English Studies | |
| 704 | Lim, Michelle | SA | Merit | Mathematical Studies | |
| 705 | Lim, Michelle | SA | Merit | Physics | |
| 706 | Lim, Michelle | SA | Merit | Specialist Mathematics | |
| 707 | Lim, Michelle | Wilderness School | Medindie | Australian Student Prize | |
| 708 | Lines, Kimberley | SA | Merit | Health, Recreation and the Community | |
| 709 | Liu, Jenny | SA | Merit | Mathematical Studies | |
| 710 | Liu, Jenny | SA | Merit | Physics | |
| 711 | Lloyd, Melissa Elena | SA | Merit | Physical Education | |
| 712 | Lo, Gary Ka-Shun | SA | Merit | Chinese (Continuers) | |
| 713 | Lobo, Yolanka | SA | Merit | Biology | |
| 714 | Lobo, Yolanka | SA | Merit | Italian (Continuers) | |
| 715 | Lobo, Yolanka | SA | Merit | Visual Arts Studies | |
| 716 | Lorenzin, Luke William | SA | Merit | Outdoor Education | |
| 717 | Luan, Tian | SA | Merit | Chemistry | |
| 718 | Luan, Tian | SA | Merit | Mathematical Studies | |
| 719 | Luckman, Georgina Annabelle | SA | Merit | Child Studies | |
| 720 | Luckman, Jessica Kate | SA | Merit | Child Studies | |
| 721 | Luu, Helen | SA | Merit | Legal Studies | |
| 722 | Ly, Lisa | SA | Merit | English as Second Language Studies | |
| 723 | Lynch, Lisa Kathleen | SA | Merit | Food and Hospitality | |
| 724 | Lynch, Sarah Elizabeth | SA | Merit | Food and Hospitality | |
| 725 | Lyndell, Lyndell | SA | Merit | Tourism | |
| 726 | Lyne, Katrina Margaret | SA | Merit | Biology | |
| 727 | Ma, Nylanda Lai-Han T | SA | Merit | Biology | |
| 728 | Maddocks, Carolyn | SA | Merit | Solo Performance | |
| 729 | Madigan, Bonnie-Fay | SA | Merit | English Studies | |
| 730 | Maguire, Kirsten Lorraine | SA | Merit | Geography Studies | |
| 731 | Mah, Jonathon Shao-Feng | SA | Merit | Information Technology Studies | |
| 732 | Mah, Jonathon Shao-Feng | SA | Merit | Mathematical Studies | |
| 733 | Mann, Alan | SA | Merit | Chemistry | |
| 734 | Mann, Alan | SA | Merit | Mathematical Studies | |
| 735 | Mann, Alan | SA | Merit | Physics | |
| 736 | Manuelli, Stephanie | SA | Merit | Vocational Studies A | |
| 737 | Manuelli, Stephanie | SA | Merit | Vocational Studies B | |
| 738 | Marafiote, Rosa | SA | Merit | Italian (Continuers) | |
| 739 | Marinkovic, Martina | SA | Merit | Visual Arts Studies | |
| 740 | Markovic, Dusan | SA | Merit | Chemistry | |
| 741 | Markovic, Dusan | SA | Merit | Physics | |