Published 2 November 2026 · By Jatin Dua, Broker of Record, RE/MAX Quantum Realty
The top-rated French Immersion schools in Mississauga are Our Lady of Mercy (8.3 out of 10), St. Gregory (7.9), St. Elizabeth Seton (7.0), St. Teresa of Avila (6.9) and Divine Mercy (6.6), all Dufferin-Peel Catholic. Peel public Immersion starts in Grade 1, is assigned by address and filled by random ranking; apply 1 December 2026 to 29 January 2027.
This guide is for Mississauga parents deciding whether, and where, to put a child in French Immersion for September 2027. You get how the two English-language boards run Immersion, my five highest-rated French Immersion schools with their real scores, the dates you need, and what homes cost in the city.
How does French Immersion work in Mississauga?
Two boards run French Immersion in Mississauga, and they work differently. Most parents do not realize the rules decide more than the rankings do.
| Peel District School Board (public) | Dufferin-Peel Catholic DSB | |
|---|---|---|
| Entry grade | Grade 1 | Grade 1 |
| French in early grades | 50% French, Grades 1 to 8 | 90% French in Grade 1, then decreasing |
| Which school | The French Immersion school serving your home address | A board French Immersion site; nine are in Mississauga |
| How seats are given | Random computer ranking; waitlist per school | Random selection if a school has more applicants than spaces |
| Application window | 1 Dec 2026 to 29 Jan 2027 (for September 2027) | Last window: 17 Nov to 1 Dec 2025 (for September 2026) |
| Busing | Under board transportation policy | Not provided for French Immersion |
| Later option | Extended French from Grade 7 | Extended French from Grade 5 |
Source: Peel District School Board French programs page; Dufferin-Peel Catholic DSB French Immersion and Extended French pages and November 2025 registration notice (read November 2026).
Both boards lead to a Certificate of French Immersion Studies in high school, which takes 10 credits taught in French. The Catholic board adds that Grade 12 students can challenge the DELF, an international French proficiency exam.
How did I pick the top 5 French Immersion schools in Mississauga?
I used the Fraser Institute’s ratings, which score each school out of 10 from provincial EQAO test results. The latest elementary report, from January 2026, ranked 3,052 Ontario schools. I matched those ratings against the Dufferin-Peel Catholic board’s published list of its nine Mississauga French Immersion schools, then checked each school’s record over several years.
Two honest limits. First, Fraser rates the whole school, not the Immersion classes alone, so a school that also runs an English program is scored on both. Second, Peel’s public board assigns one Immersion school to each address and points families to its School Finder to look it up. That makes the public “best” school simply the one that serves your street, so I cover the public board separately below.
The five schools at a glance
| School | Address | Latest rating | Ontario rank | Earlier ratings | Grade 6 class |
|---|---|---|---|---|---|
| Our Lady of Mercy | 5820 Glen Erin Dr | 8.3 | 260 of 3,052 | 8.1, 7.1, 7.7 | about 39 |
| St. Gregory | 1075 Swinbourne Dr | 7.9 | 392 of 3,052 | 7.9, 7.4, 7.9 | about 57 |
| St. Elizabeth Seton | 6133 Glen Erin Dr | 7.0 | 873 of 3,052 | 7.1, 7.6, 6.9 | about 26 |
| St. Teresa of Avila | 6675 Montevideo Rd | 6.9 | 927 of 3,052 | 7.1, 6.5, 5.4 | about 43 |
| Divine Mercy | 2840 Duncairn Dr | 6.6 | 1,137 of 3,052 | 8.0, 8.0, 7.6 | about 30 |
Source: Fraser Institute school rankings (compareschoolrankings.org), latest rating year shown as 2024; earlier ratings are 2023, 2022 and 2019. School list: Dufferin-Peel Catholic DSB.
1. Our Lady of Mercy Catholic Elementary School
What it is like: a Dufferin-Peel Catholic school on Glen Erin Drive. At 8.3 (260th in Ontario) it is the highest-rated of the board’s Mississauga French Immersion schools, and it has improved in each of the last three rated years.
Who it suits: families who want a Catholic Immersion school with a rising record.
What to check: which Immersion grades it serves. The board held its Grade 1 Immersion information session for five other Mississauga sites, so Our Lady of Mercy may take Immersion students in later grades rather than at Grade 1 entry. Ask the board before you buy nearby expecting a Grade 1 seat.
2. St. Gregory Catholic Elementary School
What it is like: a Catholic school on Swinbourne Drive that the board lists as offering French Immersion from Grade 1 to Grade 8. It rated 7.9 in each of the last two years and has stayed between 7.3 and 7.9 since 2018.
Who it suits: parents who want one school for all eight Immersion years and the steadiest record on this list. Its Grade 6 group of about 57 students is the largest of the five, so its score is less likely to swing.
What to check: how many Grade 1 spaces there are and how many applied last year. If demand beats supply, the board runs a random selection.
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3. St. Elizabeth Seton Catholic Elementary School
What it is like: a Catholic school at 6133 Glen Erin Drive, and one of the five Mississauga schools the board named for its Grade 1 Immersion information session. It rated 7.0, close to its 7.1 the year before, and has stayed between 6.9 and 7.6.
Who it suits: families who want a dependable school where Immersion students can start in Grade 1.
What to check: the Grade 6 group was only about 26, so read the score as a range, not a precise number.
4. St. Teresa of Avila Catholic Elementary School
What it is like: a Catholic school at 6675 Montevideo Road. It rated 6.9 after 7.1, up from 5.4 in 2019. About a quarter of its students were identified with special needs, a high share.
Who it suits: families who value a school that supports a wide range of learners and has been improving.
What to check: like Our Lady of Mercy, it was not one of the five Mississauga sites named for the Grade 1 information session, so confirm which Immersion grades it serves.
5. Divine Mercy Catholic Elementary School
What it is like: a Catholic school on Duncairn Drive, also named for the Grade 1 Immersion information session. It rated 8.0 in both 2022 and 2023, then dropped to 6.6.
Who it suits: families who want a school with a long strong record and are comfortable that one weaker year may be a dip, not a trend.
What to check: ask the principal what happened in the latest year and look at the newest EQAO report. The other two schools named for that session, All Saints (6.2) and St. Pio of Pietrelcina (5.8), rated lower. St. Margaret of Scotland rated 6.2 and St. Jude 5.2.
What about Peel public French Immersion schools in Mississauga?
Peel’s public board also runs French Immersion across Mississauga. Here, the rules matter more than any ranking:
- You apply to, and if accepted attend, the Immersion school that serves your home address. Flexible boundaries are not available for Grade 1 Immersion.
- Seats are not first come, first served. A computer ranks every application at random; the rest go on that school’s waitlist.
- Siblings, including twins, get no priority.
- Instruction is 50% French from Grade 1 to Grade 8.
- Information nights were set for 18 November 2026 at 6:30 p.m. at every Immersion and Extended French school.
Buying a house in Mississauga does not guarantee your child a French Immersion seat with either board. Peel ranks applicants at random and keeps a waitlist; the Catholic board holds a random selection when a school is oversubscribed. Missing the deadline drops you behind everyone who applied on time. Do not pay extra for a house because of a nearby Immersion school until you know how the seats are filled.
For a wider look at the city’s top-rated schools in every program, see my guide to the best schools in Mississauga. If you are also looking in Toronto’s west end, my top French Immersion schools in Etobicoke uses the same approach.
Is French Immersion the same as a French-language school?
No. Immersion is for children whose first language is not French. French-language schools teach everything in French and are mainly for families with a constitutional right to French-language schooling. In Ontario, a Canadian-citizen parent qualifies if French is their first language, they went to a French-language elementary school in Canada, or they have a child who attends or attended one. Other families can apply to an admission committee.
Two of Mississauga’s French-language elementary schools rate highly. Horizon Jeunesse, run by Conseil scolaire Viamonde, rated 9.3 (74th in Ontario), and René-Lamoureux, a French Catholic school, rated 8.2, though both have small Grade 6 groups of about 18 and 22. At the high school level, French Catholic Sainte-Famille rated 7.3.
What do homes cost in Mississauga in 2026?
| Home type (Mississauga) | Median price, Jan–Oct 2026 | Change vs 2025 | Average days on market |
|---|---|---|---|
| Detached | $1,225,000 | −5.8% | 31 |
| Semi-detached | $885,000 | −7.3% | 26 |
| Freehold townhouse | $880,000 | −7.4% | 29 |
| Condo townhouse | $689,300 | −8.1% | 37 |
| Condo apartment | $485,000 | −9.3% | 42 |
Source: TRREB MLS data via REALM, January–October 2026 vs the same period of 2025. City-wide medians; no prices by school zone are published.
Prices fell for every home type in 2026, which gives families more choice of street. For specific areas, see my best neighbourhoods to live in Mississauga, and for a price on your own home, what a house is worth in Mississauga.
Choose the board first, then the house. If you want Catholic Immersion with a choice of site, St. Gregory’s steady record and full Grade 1 to 8 program make it the safest pick on this list. If you are with the public board, the school is set by your address, so look it up in the School Finder before you shortlist a street, and apply on time. In both systems, a seat is never guaranteed, so have a backup plan you would be happy with.
What to do next
- Decide between the public and Catholic boards; Catholic Immersion requires that your child be eligible for a Dufferin-Peel Catholic school.
- For Peel public Immersion, look up your Immersion school in the School Finder and apply between 1 December 2026 and 29 January 2027.
- For Catholic Immersion, watch the board’s French Immersion page now; last year’s window opened in mid-November.
- Check each school’s ratings over several years and its newest EQAO report, and ask which Immersion grades it serves.
- Line up a backup school in case your child is waitlisted.
Need help with this? Talk to me.
I’m Jatin Dua, Broker of Record at RE/MAX Quantum Realty, and I’m the best agent to do this kind of work for you in Toronto and across the GTA. Over $100 million in GTA sales and 100+ families helped sell. Feel free to contact me any time: call or text 833-330-1925 or email [email protected].
Frequently asked questions
Which school has the best French Immersion in Mississauga?
Among Dufferin-Peel Catholic’s nine Mississauga French Immersion schools, Our Lady of Mercy has the highest Fraser Institute rating, 8.3 out of 10, followed by St. Gregory at 7.9. Ratings cover the whole school, not only Immersion classes. Peel public Immersion is assigned by home address, so the right public school depends on where you live in 2027.
When does French Immersion start in Peel?
French Immersion starts in Grade 1 in both Mississauga boards. Peel District School Board takes applications for September 2027 from 1 December 2026 to 29 January 2027 and assigns seats by random ranking. Dufferin-Peel Catholic also starts in Grade 1; its last window ran from 17 November to 1 December 2025 for September 2026.
Is French Immersion in Peel a lottery?
Yes, in effect. Peel District School Board gives each Grade 1 French Immersion application a random computer ranking and offers spaces in that order, with a waitlist at each school. Dufferin-Peel Catholic holds a random selection when a school has more applicants than spaces. In Mississauga in 2027, neither board guarantees a seat.
Do siblings get priority for French Immersion in Peel?
No. Peel District School Board says each French Immersion application is processed individually and siblings, including twins and triplets, receive no preference in the random selection. Each child in a Mississauga family must apply and is ranked separately, so one child can be placed while another is waitlisted.
Is there busing for French Immersion in Mississauga?
It depends on the board. Dufferin-Peel Catholic states that transportation is not provided for French Immersion students. Peel District School Board provides busing under its transportation policy; families in Mississauga can check eligibility, stops and routes through Student Transportation of Peel Region about a week before school starts.
How much French is taught in Peel French Immersion?
Peel District School Board teaches French Immersion at 50% French from Grade 1 to Grade 8. Dufferin-Peel Catholic teaches 90% in French in Grade 1, with the share decreasing in later grades, and at least 3,800 hours of French by the end of Grade 8. Both lead to a Certificate of French Immersion Studies in high school.
What is Extended French in Mississauga?
Extended French is a second entry point for students who did not start Immersion in Grade 1. In Mississauga, Peel District School Board offers it from Grade 7 for students coming from Core French, and Dufferin-Peel Catholic offers it from Grade 5, with half the elementary day in French. The Catholic board limits spaces and uses random selection when a school is oversubscribed.
Can my child join French Immersion after Grade 1 in Mississauga?
Only in limited cases. Dufferin-Peel Catholic accepts French Immersion students after Grade 1 only if space exists and the child was already in Immersion or can show French fluency, possibly through an assessment. Peel District School Board places late Grade 1 applicants on the waitlist behind everyone who applied on time, so in 2027 apply during the window.
Do houses near French Immersion schools in Mississauga cost more?
There is no published figure for a French Immersion premium in Mississauga. The city-wide median detached price was $1,225,000 from January to October 2026, down 5.8% from 2025, according to TRREB MLS data. Because seats are given by random selection, living nearby does not guarantee a place.
Sources
- Peel District School Board: French Immersion and Extended French
- Dufferin-Peel Catholic DSB: French Immersion
- Dufferin-Peel Catholic DSB: French Immersion registration opens November 17
- Dufferin-Peel Catholic DSB: Extended French
- Fraser Institute school rankings: Our Lady of Mercy, Mississauga
- Fraser Institute school rankings: St. Gregory, Mississauga
- CP24: Ontario’s best- and worst-performing elementary schools ranked (Fraser Institute, January 2026)
- Government of Ontario: French-language education
Related reading
- Top 5 Best Neighbourhoods to Live in Mississauga in 2027
- Top 5 Best Neighbourhoods to Live in Brampton in 2027
- Top 5 Best Neighbourhoods to Live in Markham in 2027
- Top 5 Best Neighbourhoods to Live in Oakville in 2027
About the author — Jatin Dua, Toronto and GTA real estate broker
I am Jatin Dua, Broker of Record and co-founder of RE/MAX Quantum Realty Inc., Brokerage, Unit 101, 799 The Queensway, Toronto. I work with buyers and sellers across Toronto and the GTA and have helped more than 100 families sell. Four-plus years of active GTA transactions and over $100 million in sales volume.
Reach me at [email protected] or 833-330-1925, or book a call.