Studying Earth Science in Ontario
You can’t always apply to earth science directly. Some universities admit you straight into it; others admit you into a broad first-year category and you choose earth science 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 earth science later
Apply to Science (ES)
You choose earth science at the end of first year, during Intent to Register in March.
You apply to the Faculty of Science (ES); the Department of Earth Sciences then offers Geology, Geophysics, Environmental Geoscience, Environmental Science and Geology and Biology modules — note there is no module actually named 'Earth Sciences', and Planetary Science and Space Exploration exists only as a Minor. The Geology, Geophysics and Environmental Geoscience streams marked 'For Professional Registration' cover the requirements for licensure as a geoscientist. SES4U counts toward the ES admission requirement but is not required.
https://www.westerncalendar.uwo.ca/Departments.cfm?DepartmentID=59&SelectedCalendar=Live&ArchiveID=Apply to Science – Earth and Environmental Science (QSE)
You choose earth science during Plan Selection in May at the end of first year.
The plans are called Geological Sciences and Earth System Science — both verified in the Arts and Science listing — not "Earth Science", so searching that exact phrase returns nothing. Do not confuse these with Geological Engineering, a Smith Engineering discipline reached through the engineering common first year (QE) with Chemistry 4U and Physics 4U required. CODE CAVEAT: confirm QSE on OUAC.
https://www.queensu.ca/artsci/undergraduate/first-year-students/plan-selectionApply to Environmental and Earth Sciences Gateway
You choose earth science at the end of first year.
The Level 2 program is Honours Earth & Environmental Sciences. The Gateway gets you the required Level 1 courses; it does not reserve a seat, and McMaster states that meeting minimum grades does not guarantee admission to limited-enrolment Level 2 programs.
https://future.mcmaster.ca/programs/environmental-earth-sciences-gateway/University of Toronto — St. George
Apply to Mathematical & Physical Sciences
You choose earth science at the end of first year.
Earth science here means Earth and Environmental Systems, plus the Geology/Geoscience/Geophysics programs — all under Mathematical & Physical Sciences, not Life Sciences. U of T lists MCV4U and SCH4U as required with SBI4U and SPH4U only recommended.
https://future.utoronto.ca/program/earth-and-environmental-systems/University of Toronto — Mississauga
Apply to Chemical & Physical Sciences
You choose earth science after first year (4.0 credits).
Earth Science, Environmental Geosciences and GeoSpatial Data Science all come through this category. Paleontology, oddly, is under Life Sciences (TML).
https://www.utm.utoronto.ca/future-students/programs/earth-scienceUniversity of Toronto — Scarborough
Apply to Physical & Environmental Sciences (OUAC TSP)
You choose earth science end of first year, on ACORN.
UTSC has no program called geology; the equivalent is Environmental Geoscience under TSP, which is not in this dataset and which carries the requirements to become a licensed geoscientist. Grade 12 Biology, Physics, Advanced Functions and Calculus & Vectors all required; mid 70s.
https://www.utsc.utoronto.ca/admissions/programs/environmental-geoscienceApply to Physical Sciences
You choose earth science you name Earth Sciences as your major when you apply to Physical Sciences.
"Apply to Physical Sciences and select Earth Sciences as your major." It is grouped with Chemistry and Physics, so it carries the full Science requirements — Advanced Functions, Calculus and Vectors and two sciences, low 80s — rather than anything geography-like. Geological Engineering is the engineering version and a separate application, and the Geoscience specialization inside Environmental Sciences (wse) is a third, different route to similar work.
https://uwaterloo.ca/future-students/programs/earth-sciencesApply to Bachelor of Science in Environmental Sciences (BS Env) (GEA)
You choose earth science on the application, among the Environmental Sciences majors.
Earth science at Guelph sits inside Environmental Sciences rather than the BSc. The relevant major is Earth Observation and Geographic Information Science.
https://www.uoguelph.ca/explore-all-programs/Apply to Science - Honours (CT)
You choose earth science on the OUAC application, as your major inside the Bachelor of Science (CT, 78%). Carleton also offers a Science Gateway — Life Sciences or Physical Sciences — for students who want a BSc but have not picked a major.
Earth Sciences is a BSc major under CT; there is also a distinctive Earth Sciences in Vertebrate Paleontology and Paleoecology major. Carleton's Honours BSc is a single OUAC code, CT, at 78%, covering 17 majors; you name the major on the application. CS is the 3-year non-honours BSc and CK is Science - Major. Undecided science applicants can choose the Life Sciences or Physical Sciences Gateway.
https://admissions.carleton.ca/programs/science/Wilfrid Laurier University — Waterloo
Apply to not offered at Laurier
Laurier has no earth science, geology or physical geography major. Geography (UZJ) is offered as a BA or BSc and covers the physical side; Environmental Science (under UZH) is the other science-side option.
https://www.wlu.ca/programs/index.htmlToronto Metropolitan University
Apply to not offered at TMU
TMU has no earth science or geology programme — nothing by that name appears among its 65 codes. Geographic Analysis (SAC, 70-75%) and Environmental and Urban Sustainability (SAS, 70-75%) are the nearest.
https://www.torontomu.ca/programs/undergraduate/Apply to Environmental Science/Environmental Studies (NLS)
You choose earth science on the application — Windsor has no earth science code; Environmental Science is the nearest.
Windsor has no earth science or geology programme. Environmental Science/Environmental Studies (NLS, 70% minimum) covers one code for both the BSc and BA versions.
https://www.future.uwindsor.ca/programs/Apply to not offered at Ontario Tech
Ontario Tech has no earth science or geology programme. Environmental Biology (DSL) and Sustainability (DTB) are the nearest.
https://ontariotechu.ca/programs/undergraduate/index.phpApply to Bachelor of Science (PS)
You choose earth science 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.
Nipissing has no earth science major. Environmental and Physical Geography, chosen inside the Bachelor of Science, is the nearest. 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 Geography (BA 4 year) (JBJ)
You choose earth science on the application — earth science sits inside Geography, Geology & Land Stewardship.
Algoma's programme is Geography, Geology & Land Stewardship, applied to through the Geography codes (JBJ 4-year, JAK 3-year, 65%+). It is a BA, not a BSc.
https://algomau.ca/academics/programs/Apply to not offered at Trent Durham
Not at Durham; Environmental Geoscience (REG) is at the Peterborough campus.
https://www.trentu.ca/durham/
Apply straight to earth science
Earth & Atmospheric Science (BSc) (YSE)
Direct entry with its own code at mid-70s, co-op available.
Direct entry at mid-70s. Earth and Planetary Science Communication (BEP) is a separate code at the same range.
Environmental Geoscience (REG)
Trent's earth science degree is Environmental Geoscience, direct entry at a 75% minimum. Water Sciences (RWA, 70%) is a related code. 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.
Earth Science (includes Environmental Science) (AI)
Direct entry at 70%, Thunder Bay. Geology (AV) and Geoarchaeology (AT) are separate codes at the same range. 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.