Studying Mathematics in Ontario
You can’t always apply to mathematics directly. Some universities admit you straight into it; others admit you into a broad first-year category and you choose mathematics later. That difference is why searching for a major by name can make it look like a university doesn’t offer it.
Apply broad, choose mathematics later
Apply to Science (ES)
You choose mathematics at the end of first year, during Intent to Register in March.
Mathematics, Applied Mathematics and Mathematical and Statistical Sciences are Science modules. Western's example on its OUAC-codes page: Math and Physics share code ES, so you add Science only once — 'Don't apply to the same code more than once.'
https://welcome.uwo.ca/next-steps/apply/narrow-down-your-program-choices.htmlApply to Science – Mathematics and Data Sciences (QSM)
You choose mathematics during Plan Selection in May at the end of first year.
QSM has the lightest science prerequisites of any Queen's science route: English 4U and Calculus and Vectors 4U plus four other 4U/M courses — NO Biology, Chemistry or Physics 4U required. That is a real advantage if you dropped the sciences. Mathematics and Engineering is a separate Smith Engineering discipline entered through QE — same word, different faculty and application. CODE CAVEAT: OUInfo names this "Mathematics and Data Sciences" while Queen's Journal reported it as "Mathematics and Statistics"; confirm the exact name/code on OUAC.
https://www.queensu.ca/artsci/undergraduate/first-year-students/plan-selectionApply to Mathematics and Statistics Gateway
You choose mathematics at the end of first year.
You apply to the Gateway, not to 'Math'. There is no standalone Honours Mathematics — the closest is Honours Mathematics and Statistics – Mathematics Specialization. Other Level 2 options are Mathematics and Computer Science, Mathematics and Physics, Biology and Mathematics, and Actuarial & Financial Mathematics. Actuarial & Financial Math additionally needs an above-Level-I supplementary application submitted during first year.
https://future.mcmaster.ca/programs/math-stats/University of Toronto — St. George
Apply to Mathematical & Physical Sciences
You choose mathematics at the end of first year.
Calendar confirms the Mathematics Major and even the Mathematics Specialist are open enrolment at 4.0 credits. MCV4U is the only Grade 12 subject required beyond English.
https://future.utoronto.ca/program/mathematics/University of Toronto — Mississauga
Apply to Mathematical & Computational Sciences
You choose mathematics after first year (4.0 credits).
The math degree is called Mathematical Sciences. Requires ENG4U, MCV4U, MHF4U. Warning: this category is NOT a back door into Computer Science — for students admitted Fall 2026-27 and later, BOTH the CS Specialist and the CS Major are open only to students admitted under the Computer Science category (TMX/CMP1).
https://www.utm.utoronto.ca/future-students/programs/mathematical-sciencesApply to Mathematics
You choose mathematics at the end of first year.
One Mathematics code covers 16 majors: Actuarial Science, Applied Mathematics, Applied Mathematics with Scientific Computing and Scientific Machine Learning, Biostatistics, Combinatorics and Optimization, Computational Mathematics, Data Science, Information Technology Management, Mathematical Economics, Mathematical Finance, Mathematical Optimization, Mathematical Physics, Mathematical Studies, Pure Mathematics, Statistics, and Mathematics/Teaching. "Apply to Mathematics and choose a major at the end of first year." Requirements are Advanced Functions, Calculus and Vectors, any 4U English and one other 4U course, individual selection from the mid-80s. Computer Science, Software Engineering, Computing and Financial Management, Math/CPA, Math/Financial Analysis and Risk Management, Math/Business Administration and the Laurier double degrees are all separate applications, not majors you can declare from inside this code. Data Science is the odd one out: you can apply to it directly (mid-80s) or reach it as a Mathematics major later.
https://uwaterloo.ca/future-students/programs/mathematicsApply to Interdisciplinary Science (LVG)
You choose mathematics on the application — Laurentian has no mathematics major; math is taken inside Interdisciplinary Science.
Laurentian has no mathematics degree after its restructuring. In Laurentian's own words, students take 'a combination of courses in biology, chemistry, computer science, geology, mathematics and physics through interdisciplinary science programs' — Interdisciplinary Science (LVG, 70%; LVF in French). If you want a math degree, it is not here.
https://laurentian.ca/undergraduate-programsApply to Bachelor of Science (PS)
You choose mathematics on the application or after — the Bachelor of Science (PS, 70% minimum) is a genuinely undeclared door, and you choose a major from the seven inside it.
Mathematics is a major inside the Bachelor of Science, and also inside the Bachelor of Arts for a BA version. Nipissing admits to the Bachelor of Science as one OUAC code, PS, at a 70% minimum; the seven science majors are chosen inside it. Liberal Science (PLB) is the non-specialised version.
https://future.nipissingu.ca/programs/Apply to not offered at Algoma
Algoma has no mathematics programme — confirmed absent from its own list. Computer Science – Data Science and AI (JAJ) is the nearest quantitative route.
https://algomau.ca/academics/programs/Apply to not offered at Trent Durham
No mathematics code at Durham; Mathematics (RMA) is at the Peterborough campus.
https://www.trentu.ca/durham/
Apply straight to mathematics
Direct from high school only — any post-secondary study makes you ineligible. Advanced Functions and Calculus & Vectors required, high 80s. The Math POSt itself is limited-enrolment and still has to be requested on ACORN after first year. Statistics is a separate OUAC application (TXU), not part of TXS.
Bachelor of Mathematics (BMath) Honours (GMH)
Guelph has two routes. The Bachelor of Mathematics (GMH, 78-84%) is the mathematical one, with Mathematical Science as its major. There is also a Mathematics major inside the BA, applied for under GK at 75-80%, which is a different degree with lighter requirements.
Mathematics (BMath) is direct entry with its own code, CMA, at 78% for honours; CMB is the 3-year non-honours version. Streams include Actuarial Science, Statistics, and Computational and Applied Mathematics and Statistics.
Mathematics is direct entry with its own code at mid-70s, as a BA or BSc. Financial Mathematics and Analytics (UZI) is a separate code, and the joint BBA + Mathematics with UWaterloo (UWW) sits at low-90s.
Mathematics is direct entry at mid-70s as a BSc (YDE) or BA (YDD), co-op available. Applied Mathematics (YSM BSc / YPM BA) and Mathematics for Education (YPQ / YPE) are separate codes; Actuarial Science (YPD) is low-80s.
Mathematics and Statistics (BH)
Brock's mathematics degree is Mathematics and Statistics, one code at mid-70s covering both. Computer Science and Mathematics Co-op (BHG, high-70s) is the joint route.
Mathematics and Its Applications (SEA)
TMU's mathematics degree is Mathematics and Its Applications, direct entry at 70-75%, co-op available. Financial Mathematics (SMT) is a separate code at the same range.
Mathematics & Statistics (NMH)
Windsor's mathematics degree is Mathematics & Statistics, one code at a 70% minimum covering both. Actuarial Science (NMA) is separate at the same minimum. Windsor publishes a minimum average rather than a range, and its own pages show the minimum is a floor for consideration, not the bar: Nursing is listed at 70% but Windsor recommends 85%, and Concurrent Education lists 75% while the admitted mean is 86%. For limited-enrolment programmes, treat the published number as the lowest you can apply with, not what gets you in.
Mathematics for Science & Industry (DSI)
Ontario Tech's mathematics degree is Mathematics for Science & Industry, direct entry at low-70s (DCI co-op at low-80s). Integrated Mathematics and Computer Science (DMC) is the joint route. Ontario Tech publishes nearly every major twice, a base code and a co-op code, usually at the same range.
Direct entry at a 70% minimum. Mathematical Physics (RMP) and Mathematical Economics (RME) are separate codes at the same minimum. Trent publishes a minimum, and its own admissions FAQ says 'meeting the minimum does not guarantee admission'. The safety net is real: if you are not admitted to a competitive programme, Trent automatically assesses you for an alternate offer into a similar one, with no second application.
Direct entry at 70%, Thunder Bay only. Lakehead has two campuses and many programmes run at only one: check the campus in the programme name before you apply, because Thunder Bay and Orillia are 1,400 km apart.
Read off each university’s own admissions pages, and covering the seven campuses Ontario students apply to most. Entry structures change — confirm with the university before you build a timetable around one. Search all programs.