| OMLTA (Ontario Modern Language Teachers' Association) Toronto French Contest Prize | University of Toronto | Faculty of Arts and Science | Department of French | French |
| Orangecorporation Annual Award in Visual Arts | Simon Fraser University | Faculty of Arts and Social Sciences | School for the Contemporary Arts | Visual Arts |
| Order of Sons of Italy of Ontario | University of Toronto | Faculty of Arts and Science | Department of Italian Studies | |
| Order Sons of Italy Scholarship | St. Jerome's University | Faculty of Arts | Department of Italian and French Studies | Italian Studies |
| Oren A. Earl Bursary | Queen's University | Faculty of Arts and Science | Department of Chemistry | Bachelor of Science: Honours Chemistry |
| Organic Chemistry Prize - Trent University | Trent University | Faculty of Arts and Science | Department of Chemistry | |
| Orlene Murad Prize | University of Regina | Faculty of Arts | Department of English | |
| Orr-Fry Prize in English | Queen's University | Faculty of Arts and Science | Department of English Language and Literature | |
| Orville and Carmel Brown Scholarship | Queen's University | Faculty of Applied Science, Faculty of Arts and Science | Department of Physics, Engineering Physics and Astronomy | Engineering Physics |
| Orwell Corner Historic Village Prize | University of Prince Edward Island | Faculty of Arts | Department of History | |
| Osborne Studd Book Prize in History | Queen's University | Faculty of Arts and Science | Department of History | |
| Oswald Hall Dissertation Fellowship in Sociology | McGill University | Faculty of Arts | Department of Sociology | |
| Oswald Hall Prize | McGill University | Faculty of Arts | Department of Sociology | |
| Oswell Robinson Assiniboia Sherwood Masonic Scholarship in Music | University of Regina | Faculty of Fine Arts | Department of Music | Bachelor of Music |
| Ottawa Film Society Scholarship for Film Studies | Carleton University | Faculty of Arts and Social Sciences | School for Studies in Art and Culture | Film Studies |
| Outstanding Achievement in the Humanities Scholarship | University of Lethbridge | Faculty of Arts and Science | Department of English, Department of Modern Languages, Department of Philosophy, Department of History, Department of Religious Studies | English, Modern Languages, Philosophy, History, Religious Studies |
| Outstanding Overall Performance Awards | Ryerson University | Faculty of Arts | Department of Geographic Analysis | |
| Outstanding Progess in the Program Awards | Ryerson University | Faculty of Arts | Department of Geographic Analysis | |
| Owen Ilkyaz Tuncali Award | Nipissing University | Faculty of Arts and Science | | Mathematics |
| P. James Giffen Award | University of Toronto | Faculty of Arts and Science | Department of Sociology | |
