| Dr | Prince Atta | Opoku | Harbin Institute of Technology | China | Environmental Science | Wastewater Treatment and Energy Generation | Best Researcher Award | youngscientistawards.com |
| Assoc. Prof. Dr | Elżbieta | Opiłowska | University of Wrocław | Poland | Social Sciences | Border Studies | Best Researcher Award | youngscientistawards.com |
| Mr | SAMSON OKIKIOLA | OPARANTI | Université du Québec à Chicoutimi | Canada | Engineering | High Voltage Insulation | Young Scientist Award | |
| Dr | Marc | Oosthuizen | The IIE Varsity College | South Africa | Social Sciences | International Relations and Diplomacy | Best Researcher Award | |
| Ms | Wei Ling | Ooi | Universiti Teknologi Malaysia | Malaysia | Engineering | Electronic Systems Engineering | Best Researcher Award | |
| Ms | Victorine | Onyango | Egerton university | Kenya | Agricultural and Biological Sciences | Agricultural and Biological Sciences | Young Scientist Award | youngscientistawards.com |
| Mr | Gideon | Onuh | Technion-Israel Institute of Technology | Israel | Engineering | Chemical Engineering | Young Scientist Award | |
| Mr | Obinna | Onodugo | Baylor University | United States | Engineering | Electric Machines and Drives | Research Excellence Award | youngscientistawards.com |
| Prof | Francis | ONDITI | Riara University, Nairobi | Kenya | Social Sciences | Conflictology/ Peace and Conflict Studies | Best Researcher Award | youngscientistawards.com |
| Mrs | Temitayo | Omoyeni | Cyprus International University | Nigeria | Engineering | Bioengineering/Biomedical Engineering | Best Researcher Award | youngscientistawards.com |
| Mr | Oluwole Nurudeen | Omonijo | Central South University | China | Business, Management and Accounting | Business administration | Best Researcher Award | |
| Dr | Victor | Omollo | Kenya Medical Research Institute | Kenya | Health Professions | HIV prevention research | Young Scientist Award | |
| Assoc Prof Dr | Amir | Omidvar | Amir Omidvar/Shiraz University of Technology | Iran | Engineering | Mechanical Engineering/Renewable Energy and Thermal Comfort | Best Researcher Award | |
| Assoc Prof Dr | Aldo | Ometto | Universidade de São Paulo - USP | Brazil | Engineering | Engenharia de Produção - Engenharia da Sustentabilidade | Best Researcher Award | |
| Dr | Abdullah | Omar | Syrian Private university | Syria | Medicine and Dentistry | Pediatrics | Best Researcher Award | |
| Assoc Prof Dr | Bolutife | Olofinjana | Obafemi Awolowo University, Ile-Ife Nigeria | Nigeria | Physics and Astronomy | Materials Physics | Best Researcher Award | |
| Dr | Damien | Olivier | Universidad Autónoma de Baja California Sur | Mexico | Environmental Science | Ecología Marina | Best Researcher Award | youngscientistawards.com |
| Dr | Julien | Olivet | Rega Institute/KU Leuven | Belgium | Biochemistry, Genetics and Molecular Biology | Epigenetics, HDAC, Cryo-EM | Young Scientist Award | youngscientistawards.com |
| Prof Dr | Ricardo | Oliveira | Universidade de São Paulo/Faculdade de Ciências Farmacêuticas | Brazil | Agricultural and Biological Sciences | Microbiologia Aplicada | Best Researcher Award | |
| Mr | Willian | Oliveira | Federal University of Santa Catarina | Brazil | Agricultural and Biological Sciences | algae ecophysiology | Young Scientist Award | youngscientistawards.com |