| OSN 2026 | 6 | Afiq Khazindar Raiyan | MAN 1 Pekanbaru | 100 | 42 | 78 | 85 | 52 | 48 | | 405 | Perak |
| 56 | Dani Widyatna | SMA Mutiara Harapan | 76 | 30 | 9 | 15 | 9 | 24 | | 163 | |
| Zafran Prayata Wiza | MAN 2 Pekanbaru | Semifinalis | | |
| Melvin Agelus | SMAN 1 Tualang | Semifinalis | | |
| OSN 2025 | 21 | Melvin Agelus | SMP YPPI Perawang | 62 | 36 | 26 | 62 | 6 | 14 | | 206 | Perunggu |
| 27 | Atanasius Brilliant Siringo Ringo | SMAN Binaan Khusus Kota Dumai | 100 | 9 | 9 | 62 | 6 | 6 | | 192 | Perunggu |
| Dani Widyatna | SMA Mutiara Harapan | Semifinalis | | |
| Afiq Khazindar Raiyan | MAN 1 Pekanbaru | Semifinalis | | |
| OSN 2024 | 1 | Franklin Filbert Irwan | SMA Darma Yudha | 100 | 100 | 100 | 100 | 100 | 100 | | 600 | Emas |
| 15 | Dimas Bayu Nugroho | MAN 2 Pekanbaru | 100 | 59 | 43 | 81 | 8 | 54 | | 345 | Perak |
| 44 | Aldiraj Damar Windani | MAN 1 Pekanbaru | 28 | 18 | 19 | 81 | 40 | 8 | | 194 | |
| 49 | Atanasius Brilliant Siringo Ringo | SMAN Binaan Khusus Kota Dumai | 100 | 5 | 0 | 50 | 8 | 8 | | 171 | |
| 52 | Nathanael Nicolas Chang | SMA Darma Yudha | 28 | 59 | 19 | 35 | 8 | 8 | | 157 | |
| 58 | Nicholas | SMAN 1 Tualang | 17 | 5 | 19 | 50 | 8 | 37 | | 136 | |
| OSN 2023 | 31 | Franklin Filbert Irwan | SMP Witama Nasional Plus | 100 | 13 | 34 | 100 | | 18 | | 265 | |
| 48 | Dhimas Putra Sulistio | MAN 2 Pekanbaru | 80 | 18 | 5 | 85 | 20 | 16 | | 224 | |
| 64 | Hannan Afif Darmawan | MAN 2 Pekanbaru | 38 | 25 | 5 | 100 | 0 | 6 | | 174 | |
| 67 | Felesia Junelus | SMAN 1 Tualang | 59 | 13 | 9 | 65 | 7 | 6 | | 159 | |
| OSN 2022 | 26 | Danniel | SMAN 1 Tualang | 100 | 0 | 0 | 52 | 23 | 26 | | 201 | Perunggu |
| 30 | Muhammad Naufal Muzaki | MAN 2 Pekanbaru | 62 | 34 | 11 | 10 | 23 | 36 | | 176 | Perunggu |
| 37 | Muhammad Arkan Anzuye | MAN 2 Pekanbaru | 38 | 25 | 5 | 26 | 23 | 36 | | 153 | |
| 55 | Ranashahira Reztaputri | MAN 1 Pekanbaru | 38 | 25 | 5 | 10 | 13 | 17 | | 108 | |
| 61 | Kimi Jenson Tjan | SMA Darma Yudha | 46 | | 5 | 7 | 9 | 36 | | 103 | |
| 66 | Athar Bakhtiar Aziz | SMA Cendana Duri | 46 | | 0 | 8 | 4 | 30 | | 88 | |
| 73 | David Neilleen Irvinne | SMAN 8 Pekanbaru | 38 | 25 | 5 | 8 | 4 | | | 80 | |
| 92 | Franklin Filbert Irwan | SMP Witama Nasional Plus | 10 | | | | | | | 10 | |
| KSN 2021 | 17 | Vannes Wijaya | SMAN 8 Pekanbaru | 31 | 30 | 100 | 30 | 61 | 36 | | 288 | Perunggu |
| 42 | Khansa Adilla Reva | MAN 2 Pekanbaru | 20 | 30 | 27 | 8 | 42 | 60 | | 187 | |
| 45 | Muhammad Zaky Ghoetti Ananda | MAN 2 Pekanbaru | 0 | 30 | 15 | 30 | 42 | 60 | | 177 | |
| KSN 2020 | 46 | Hirzy Fakhriadh Ardika Harnedi | MAN 2 Pekanbaru | 45 | 17 | 38 | 32 | 12 | 15 | | 159 | |
| 48 | Dzaky Fiantino | MAN 2 Pekanbaru | 39 | 35 | 38 | 22 | 12 | 10 | | 156 | |
| 54 | Johanes Lee | SMAN 8 Pekanbaru | 23 | 35 | 38 | 22 | 24 | 0 | | 142 | |
| OSN 2019 | 46 | Yusuf Ilham | MAN 2 Pekanbaru | 12 | 14 | 64 | 41 | 0 | 15 | | 146 | |
| 54 | Fadhil Aldito Putra | SMAN 8 Pekanbaru | 5 | 14 | 52 | 41 | 0 | 15 | | 127 | |
| OSN 2018 | 38 | Hokki Suwanda | SMAN 1 Pekanbaru | 14 | 20 | 29 | 25 | 28 | 15 | | 131 | |
| 49 | Chintya Wijaya | SMAN 8 Pekanbaru | 6 | 20 | 18 | 25 | 25 | 15 | | 109 | |
| OSN 2017 | 21 | Muhammad Aulia Akbar | SMAN 8 Pekanbaru | 74 | 15 | 16 | 13 | 32 | 12 | | 162 | Perunggu |
| 25 | Andrew Fanggara | SMA Darma Yudha | 38 | 25 | 25 | 24 | 34 | 5 | | 151 | Perunggu |
| 43 | Rachman M. Wicaksana | SMAN Plus Provinsi Riau | 26 | 15 | 16 | 24 | 22 | 12 | | 115 | |
| OSN 2016 | 72 | Hubert Tatra | SMA Darma Yudha | 0 | 17 | 6 | 7 | 15 | 0 | | 45 | |
| OSN 2015 | 66 | Della Herli Rahman | SMAN 1 Tualang | 12 | 0 | 14 | 0 | 14 | 16 | | 56 | |
| OSN 2014 | 55 | Barri Anand | SMAN Plus Provinsi Riau | 0 | 66 | 18 | 20 | 20 | 18 | 19 | 7 | 168 | |
| 61 | Pandito Hudiarso A. R. S. | SMAN Plus Provinsi Riau | 18 | 39 | 7 | 20 | 20 | 18 | 19 | 7 | 148 | |
| 67 | Willy Wijaya | SMAN 8 Pekanbaru | 0 | 39 | 7 | 16 | 20 | 18 | 19 | 7 | 126 | |
| OSN 2013 | 79 | Pandito Hudiarso A. R. S. | SMAN Plus Provinsi Riau | 18 | 9 | 0 | 18 | 24 | 0 | 18 | 0 | 87 | |
| OSN 2012 | 46 | Teresa Pranyoto | SMAN 8 Pekanbaru | 45 | 20 | 0 | 0 | 30 | 0 | 21 | 18 | 134 | |
| 54 | Faizuddarain Syam | SMAN Plus Provinsi Riau | 30 | 10 | 0 | 0 | 30 | 20 | 7 | 18 | 115 | |
| 73 | Fikri Aulia | SMAN Plus Provinsi Riau | 0 | 10 | 10 | 0 | 30 | 0 | 0 | 18 | 68 | |
| OSN 2011 | 55 | Muhammad Wildan Hariry | SMAN Plus Provinsi Riau | | 359 | |
| 60 | Faizuddarain Syam | SMAN Plus Provinsi Riau | | 286 | |
| 76 | Victorio Khomas | SMAN 8 Pekanbaru | | 198 | |
| OSN 2010 | 5 | Tito D. Kesumo Siregar | SMAN Plus Provinsi Riau | | 796 | Emas |
| 20 | Leonard Halim | SMA Santa Maria Pekanbaru | | 662 | Perunggu |
| 41 | Darwin Wirawan | SMAN 1 Pekanbaru | | 527 | |
| 91 | Prayogo | SMAK Kalam Kudus Selatpanjang | | 273 | |
| OSN 2009 | 12 | Fakhri | SMAN Plus Provinsi Riau | | 585 | Perak |
| 18 | Tito D. Kesumo Siregar | SMAN Plus Provinsi Riau | | 540 | Perunggu |
| 58 | Leonard Halim | SMA Santa Maria Pekanbaru | | 365 | |
| 61 | Hartono | SMAK Kalam Kudus 4 Bengkalis | | 352 | |
| OSN 2008 | 7 | Muhammad Adinata | SMAN Plus Provinsi Riau | | 11631.58 | Perak |
| 50 | Fakhri | SMAN Plus Provinsi Riau | | 6443.16 | |
| 54 | Hilman Taufiq | SMAN Plus Provinsi Riau | | 6157.89 | |
| 70 | Rio Fernando | SMAN 2 Rambah Hilir | | 4127.37 | |
| OSN 2007 | 22 | Azlan Indra | SMAN Plus Provinsi Riau | | 2349.6 | Perunggu |
| 48 | Alston Evan Wijaya | | | 1761.3 | |
| OSN 2006 | | Rahayu | | | | |
| Eky Pratama Halim | | | | |
| OSN 2005 | 59 | Triguna Ashin Wijaya | SMAN Binaan Khusus Kota Dumai | 0 | 0 | 0.00 | 0.00 | 0.00 | 0 | | 2366 | |
| OSN 2004 | 49 | Abdul Gapur | SMAN Plus Provinsi Riau | | 6396 | |
| OSN 2003 | 40 | Rizky Zulkarnaen | SMAN 2 Dumai | 0 | 30 | 0 | | 30 | |