| Ong, Wilson |
Marist College Pagewood |
15250 |
| Ono, Ayana |
Beverly Hills Girls High School |
15240, 15830 |
| Onus, Nadia Elizabeth |
Penrith Anglican College |
15390, 15670 |
| Ooi, Min Ming |
INTI International College Penang |
15240 |
| Ooi, Shen-Long |
James Ruse Agricultural High School |
15250, 15260, 15330 |
| Ooi, Yin Lin |
Beverly Hills Girls High School |
15210, 15240 |
| Oosterhoff, Guy |
Korowal School |
15050 |
| Opit, Vanessa |
Moriah College (Queens Park Campus) |
15030, 15320 |
| Orchard, David James |
Kooringal High School |
15020, 15160, 15170 |
| Orchard, Marc Alexander |
Macintyre High School Inverell |
15210 |
| Orellana, Sebastian |
Normanhurst Boys High School |
15160, 15170 |
| Oremus, Jade |
Masada College |
15180, 15380 |
| Orenstein, Nicole |
Oxley High School |
15400 |
| Organo, Vanessa Claire |
The Illawarra Grammar School |
15300, 15310 |
| Oringo, Donna |
Penrith High School |
15040, 15140, 15250, 15260, 15370 |
| Oris, Grecco |
Marist College North Shore |
15370 |
| Orjekh, Daria |
Merewether High School |
15040, 15140, 15160, 15220, 15250 |
| Orme, Patrick John Rafferty |
St Patrick's College |
15270, 15320, 15380 |
| Orobello, Jessica Antoinette |
Nagle College |
15230 |
| Orr, Christopher Toby |
Parkes High School |
15290 |
| Orr, Geoffrey Fraser |
Knox Grammar School |
15240 |
| Orr, Stuart Thomas |
Knox Grammar School |
15030, 15110, 15250, 15260 |
| Orthongthed, Tagsaporn Natalie |
Brigidine College Randwick |
15140, 15270, 15370 |
| Osborn, Hannah Louise |
Maitland Grossmann High School |
15270, 15390 |
| Osborne, Richie A |
SHORE - Sydney Church of England Grammar School |
15040 |
| Oshiro, Marco |
Westfields Sports High School |
16080 |
| Osland Johnston, Jessica Ruth |
Callaghan College, Jesmond Campus |
15020, 15350 |
| Osman, Rouba |
South Western Sydney Institute - Bankstown Campus |
15510 |
| Osman, Sarah-Jane |
Hunter Institute - Newcastle Campus |
15230 |
| Ostojic, Aleksander |
St Johns Park High School |
15230 |
| Ostowari, Danesh |
St Aloysius College |
15240 |
| Oswald, Holly Michele |
Narrabeen Sports High School |
15400 |
| Oswald, Melinda Jane |
Orange High School |
15060, 15180, 15230 |
| Othman, Jad |
Merewether High School |
15050, 15140, 15250, 15260, 15320, 15330 |
| Otto, David William |
Sydney Technical High School Bexley |
15170 |
| Otto, Rebecca |
Woolgoolga High School |
15020 |
| Otton, Henry RD |
SHORE - Sydney Church of England Grammar School |
15020, 15400 |
| Ou, Christy Hui Ling |
Carlingford High School |
15250, 15300, 15310 |
| Ou, Eling (Chun Miao) |
St George Girls High School Kogarah |
15240 |
| Ovadia, Edward Raoul |
Sydney Boys High School |
15140, 15170, 15240, 15250, 15680 |
| Ovzinsky, Grant Milton |
Northholm Grammar School |
15080, 15400 |
| Ow, Amy |
St George Girls High School Kogarah |
15240, 15760, 15780 |
| Owen, Isaac Aiden |
Gosford High School |
15250, 15260, 15330 |
| Owen, Jenna Rae |
Dubbo Christian School |
15320 |
| Owens, Kieran Samuel |
Fort Street High School Petersham |
15050, 15160, 15250, 15260, 15330 |
| Owers, Meagan |
Oxley High School |
15400 |
| Owers, Niall Colin |
Knox Grammar School |
15230 |
| Oxlade, Rebecca |
Macarthur Anglican School (Cobbitty Campus) |
15020, 15320 |
NSW Government