This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2005, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 728 | Noack, Jessica Anne | SA | Merit | Craft Practical | |
| 729 | Noble, Michael David | SA | Merit | Agricultural and Horticultural Management | |
| 730 | Noble, Michael David | SA | Merit | Agricultural and Horticultural Principles | |
| 731 | Noble, Michael David | SA | Merit | Natural Resources Management | |
| 732 | Nolan, Ashleigh Patricia | SA | Merit | Biology | |
| 733 | Nolan, Ashleigh Patricia | SA | Merit | English Studies | |
| 734 | Nolan, Ashleigh Patricia | SA | Merit | Legal Studies | |
| 735 | Nolan, Ashleigh Patricia | SA | Merit | Modern History | |
| 736 | Nolan, Ashleigh Patricia | St Peters Girls School | Stonyfell | Australian Student Prize | |
| 737 | Noll, Lisa Kate | SA | Merit | English Communications | |
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| 738 | Noor, Anthony | SA | Merit | Chemistry | |
| 739 | Noor, Anthony | SA | Merit | Physics | |
| 740 | Norman, Catherine Anne | SA | Merit | Biology | |
| 741 | Norman, Catherine Anne | SA | Merit | English Studies | |
| 742 | Norton, Chantel | SA | Merit | Arts and the Community | |
| 743 | Nowland, Pia Caroline | SA | Merit | English Communications | |
| 744 | O'Brien, Bethany | SA | Merit | Modern History | |
| 745 | O'Brien, Bethany | SA | Merit | Studies of Societies | |
| 746 | O'Donnell, Jarryd Scott | SA | Merit | Geography Studies | |
| 747 | O'Loughlin, Nicholas Charles | SA | Merit | Mathematical Studies | |
| 748 | O'Malley, Elyse-Ann | SA | Merit | Mathematical Studies | |
| 749 | O'Malley, Elyse-Ann | SA | Merit | Physics | |
| 750 | O'Malley, Elyse-Ann | SA | Merit | Specialist Mathematics | |
| 751 | O'Malley, Elyse-Ann Caitlin | Loreto College | Marryatville | Australian Student Prize | |
| 752 | O'Riley, Charee | SA | Merit | Australian History | |
| 753 | Oates, Gregory | SA | Merit | Chemistry | |
| 754 | Oates, Gregory | SA | Merit | Mathematical Studies | |
| 755 | Oates, Gregory | SA | Merit | Physics | |
| 756 | Oates, Gregory Peter | Xavier College Gawler Belt Campus | Gawler Belt | Australian Student Prize | |
| 757 | Obaydin, Ivan | SA | Merit | Systems and Control Products B | |
| 758 | Ogi, Harumi | SA | Merit | Japanese (Continuers) | |
| 759 | Ogilvie, Alexandra Jane | SA | Merit | English Communications | |
| 760 | Ohlendorf, Sean Graham Campbell | SA | Merit | German (Continuers) | |
| 761 | Ohlendorf, Sean Graham Campbell | SA | Prize: Goethe Prize | German | |
| 762 | Oliver, Todd James | SA | Merit | English Communications | |
| 763 | Ong, Mei Jin | SA | Merit | English as Second Language Studies | |
| 764 | Osborne, Prema Jean | SA | Merit | Music Individual Study | |
| 765 | Ouslinis, Zachary John | SA | Merit | Communication Products A | |
| 766 | Padhye, Vaishali | SA | Merit | Biology | |
| 767 | Padhye, Vaishali | SA | Merit | English Studies | |
| 768 | Padmanabhan, Reena | SA | Merit | English Studies | |
| 769 | Padmanabhan, Reena | SA | Merit | Modern History | |
| 770 | Paley, Madeleine Kate | SA | Merit | Contemporary Issues and Science | |
| 771 | Palm, Carly Erin | SA | Merit | Business Documents | |
| 772 | Panagis, Fiona | SA | Merit | Italian (Continuers) | |
| 773 | Papps, Despina | SA | Merit | Mathematical Studies | |
| 774 | Parasiers, Jasmin Sonya | SA | Merit | Classical Studies | |
| 775 | Parasiers, Jasmin Sonya | SA | Merit | Mathematical Applications | |
| 776 | Parasiers, Jasmin Sonya | SA | Prize: Classical Association of SA Prize | Classical Studies | |
| 777 | Parkin, Julia Lenore Bamford | SA | Merit | English Studies | |