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.
| 716 | Nguyen, Mai-Chi | SA | Merit | Physics | |
| 717 | Nguyen, Phillip | SA | Merit | Mathematical Studies | |
| 718 | Nguyen, Phillip | SA | Merit | Specialist Mathematics | |
| 719 | Nguyen, Thi Thanh Mai | SA | Merit | Mathematical Studies | |
| 720 | Nguyen, Tri Hung | SA | Merit | Mathematical Studies | |
| 721 | Nguyen, Tri Hung | SA | Merit | Specialist Mathematics | |
| 722 | Nicholas, John James | SA | Merit | Material Products B | |
| 723 | Nicholls, Lachlan James | SA | Merit | Physics | |
| 724 | Nicholls, Lachlan James | SA | Merit | Specialist Mathematics | |
| 725 | Nicolas, Alexandra Kathryn | SA | Merit | Nutrition | |
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| 726 | Nita, Irina Maria | SA | Merit | Dance | |
| 727 | Nitschke, Jessica | SA | Merit | Small Business Enterprise | |
| 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 | |
| 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 | |