Choosing a high school in Mississauga means sorting through dozens of options, each with different strengths, programs, and reputations. For families new to the city or navigating the Ontario school system for the first time, figuring out which schools are worth considering can feel overwhelming.
This guide covers the top-ranked high schools in Mississauga, how rankings work, what makes each school different, and how to apply to the programs that match your child's interests and goals.
How Mississauga high schools are ranked
The Fraser Institute ranking works like a report card for schools, scoring each one out of 10 based on EQAO test results. EQAO (Education Quality and Accountability Office) is the organization that runs province-wide tests in reading, writing, and math for Ontario students at specific grade levels, with 85 percent meeting literacy standards on the Grade 10 test in 2025.
Here's what the rankings capture and what they miss:
- EQAO scores: Standardized test results that measure academic performance across all Ontario schools
- What's missing: School culture, extracurricular programs, arts offerings, and how supported students actually feel day-to-day
Think of rankings as one piece of information, not the whole story. A school with a slightly lower Fraser score might still be the better fit if it offers a program your child loves or a community where they feel at home.
The best high schools in Mississauga
The schools below draw on Fraser Institute scores, EQAO results, specialty programs, and community reputation. Each school has different strengths, so the "best" one depends on what your child needs.
John Fraser Secondary School
John Fraser sits in Meadowvale and consistently scores among the highest in Peel Region. The school offers the IB Diploma Programme, which is an internationally recognized pre-university program with rigorous coursework and independent research projects.
Students here tend to be academically focused and self-motivated. The school has high expectations, and the student body generally takes learning seriously.
St Aloysius Gonzaga Secondary School
St Aloysius Gonzaga is a Catholic school in Erin Mills that regularly lands at or near the top of Mississauga rankings. The school focuses heavily on university preparation, and graduates move on to competitive programs across Ontario.
This school works well for faith-based families who also want strong academics. Students from other backgrounds do attend, though religious education is part of daily school life.
Lorne Park Secondary School
Lorne Park is located in the neighbourhood with the same name and earns high Fraser scores year after year. The school balances strong academics with a thriving arts program, so students get both.
Compared to some of Mississauga's larger schools, Lorne Park has a smaller, more community-focused feel. Students who want both academic rigour and creative outlets tend to do well here.
Cawthra Park Secondary School
Cawthra Park is known across the city for its Regional Arts Program (RAP), which is an audition-based program for students talented in music, dance, drama, or visual arts. Students from all over Mississauga apply to RAP, making it a destination school for creatively driven teens.
The school also runs a regular academic stream with solid performance. Even students who aren't in RAP benefit from the school's focus on creativity and expression.
Port Credit Secondary School
Port Credit is one of Mississauga's older schools, located near the waterfront in the Port Credit neighbourhood. The school balances academics with a wide range of extracurriculars, from sports teams to clubs to student leadership opportunities.
The school has a loyal community and a reputation for being welcoming. Students looking for a balanced high school experience with strong school spirit often find what they're looking for here.
Glenforest Secondary School
Glenforest is known for its diverse student body and strong focus on science and technology. The school attracts students interested in STEM pathways, with programs and clubs that support exploration in tech, engineering, and health sciences.
Located along Hurontario, the school's diversity means students are exposed to different cultures and perspectives every day. Students interested in STEM careers while still getting a well-rounded education tend to thrive here.
The Woodlands Secondary School
The Woodlands is located in east Mississauga's Erindale area and has a solid academic reputation. The school is known for being supportive, and students report feeling comfortable asking for help when they're stuck.
Families in the catchment area who want consistent academic performance without intense pressure often choose this school. Students who do well in nurturing environments tend to succeed here.
St Marcellinus Secondary School
St Marcellinus is a Catholic school in central Mississauga with strong academic results and an active school community. The school emphasizes both university preparation and character development through faith-based education.
The school has a tight-knit feel. Students often report feeling connected to their peers and teachers, which can make the high school transition easier.
Iona Catholic Secondary School
Iona is a Catholic school in west Mississauga with a strong reputation for university preparation. The school culture is described as tight-knit, with students and staff who know each other well.
Families who want a faith-based education in a smaller, more personal setting often choose Iona. Students here report a strong sense of belonging.
Mentor College
Mentor College is a private school, which means it's independent from the public and Catholic boards and charges tuition. The school is known for small class sizes and individualized attention, with teachers who can adjust their approach to each student's learning style.
Families seeking an alternative to the public system, particularly if their child benefits from more one-on-one support, often consider Mentor College. The school has a strong university placement record.
Best public high schools in Mississauga
Public schools in Ontario are funded by the province and free to attend. If your home address falls within a school's catchment area (the geographic boundary that determines which school you're assigned to), your child automatically goes there, though you can request a transfer to another public school if space allows.
Best Catholic high schools in Mississauga
Catholic schools in Ontario are publicly funded, which surprises many families. They're free to attend, just like public schools. Students don't have to be Catholic to enroll in most cases, though faith-based values and religious education are woven into the curriculum.
Catholic schools are part of the Dufferin-Peel Catholic District School Board, while public schools fall under the Peel District School Board. Both systems follow the Ontario curriculum, but Catholic schools integrate religious teachings and often emphasize community service.
Best private high schools in Mississauga
Private schools are fee-based and operate independently from the public and Catholic boards. The Fraser Institute doesn't rank them in the same way as public schools, so comparing them directly can be tricky.
Families typically consider private schools for smaller class sizes, specific teaching philosophies, or when a child needs a different learning environment than what's available in the public system. Private schools can be expensive, so weighing the cost against the benefits matters.
Mentor College
Mentor College is a well-established private school known for academic rigour and small classes. Graduates move on to competitive programs across Canada.
ISNA High School
ISNA is an Islamic faith-based private school that integrates Islamic values with the Ontario curriculum. The school works well for Muslim families seeking an education that aligns with their faith while meeting provincial academic standards.
Holy Name of Mary College School
Holy Name of Mary is a Catholic independent school for girls, with a strong focus on academics and leadership development. Families looking for a single-gender environment that emphasizes empowerment often choose this school.
Specialty programs at Mississauga high schools
Ontario high schools offer programs that go beyond the standard curriculum. Many families don't realize what's available until they start researching schools, so knowing your options early helps.
- IB Diploma Programme (IB): An internationally recognized pre-university program known for rigour and critical thinking, offered at John Fraser Secondary School
- Regional Arts Program (RAP): An audition-based program for students talented in music, dance, drama, or visual arts, offered at Cawthra Park Secondary School
- Extended French and French Immersion: Programs where core subjects are taught in French, helping students become bilingual, available at several Peel District School Board schools
- Advanced Placement (AP): University-level courses taken in high school that can earn post-secondary credit, offered at select Mississauga schools
- Specialist High Skills Major (SHSM): A program that lets students focus on a career sector like health, arts, or business while earning their diploma, available at several schools across Mississauga
Mississauga high school neighbourhoods and catchment areas
A catchment area is the geographic zone that determines which public school a student is assigned to based on home address. Many families move to specific neighbourhoods specifically to access a top school, though some also consider options in nearby Toronto.
You can look up your catchment school on the Peel District School Board or Dufferin-Peel Catholic District School Board websites by entering your home address. Here are some of the most sought-after catchment areas:
- Meadowvale feeds into John Fraser Secondary School
- Lorne Park feeds into Lorne Park Secondary School
- Port Credit feeds into Port Credit Secondary School
- Erin Mills feeds into St Aloysius Gonzaga (Catholic) and other area schools
- Cooksville feeds into Cawthra Park Secondary School
Catchment boundaries can change, so verify directly with the school board before making any major decisions.
How to apply to a Mississauga high school
The application process depends on whether you're enrolling in your catchment school or applying to a specialty program. Most students are automatically assigned to their local school, but competitive programs require a separate application, and timelines are often earlier than you'd expect.
1. Confirm your catchment school
Most students are automatically assigned to their local school based on home address. You can confirm your catchment school by visiting the Peel District School Board or Dufferin-Peel Catholic District School Board website and entering your postal code.
2. Research specialty program requirements
Programs like IB or RAP require a separate application, audition, or entrance assessment. Check the specific school's website early in Grade 8, as deadlines are usually in the fall or winter before your child starts Grade 9.
3. Gather required documents
You'll typically need recent report cards, proof of address, and any program-specific materials like a portfolio or reference letter. Most schools provide a clear checklist of what's needed.
4. Submit your application
Standard enrollment is handled through the school board's online portal. Specialty program applications are usually submitted directly to the school. Catholic school enrollment may require a baptismal certificate for some programs.
5. Track response timelines
Competitive programs have limited spots, and responses may take several weeks. Having a backup plan helps if your child isn't accepted into their first-choice program.
How to help your child succeed at a top Mississauga high school
Getting into a great school is one thing. Thriving there is another. The transition to high school is one of the biggest academic jumps students face, and even strong students can struggle with the faster pace and higher expectations.
Here's what helps:
- Start strong in Grade 9: Habits formed in the first year carry through all four years, so staying organized and asking for help early makes a difference
- Use school resources first: Most top schools have guidance counsellors, peer tutoring, and after-school help sessions that are free and designed to support students before they fall behind
- Get targeted academic support: If your child is struggling in a specific subject or preparing
If your child is preparing for an entrance assessment or adjusting to the pace of a competitive program, working with a tutor can make a real difference. Find a tutor at TutorLyft.
