Best secondary schools in Mississauga (2025)

Secondary (high) schools and combined schools. Ranked by the Success Index (Canada) from official Canadian data; 33 schools in Mississauga, Ontario. Rank positions shown on each profile are within Canada and Ontario.

1
86
Lorne Park Secondary SchoolMississauga · Public Secondary96% OSSLT pass rate · 795 students
2
82
John Fraser Secondary SchoolMississauga · Public Secondary95% OSSLT pass rate · 1,715 students
3
77
St Marcellinus Secondary SchoolMississauga · Catholic Secondary91% OSSLT pass rate · 1,715 students
4
76
St Joseph Secondary SchoolMississauga · Catholic Secondary91% OSSLT pass rate · 1,185 students
5
74
Streetsville Secondary SchoolMississauga · Public Secondary91% OSSLT pass rate · 810 students
6
72
St Francis Xavier Secondary SchoolMississauga · Catholic Secondary91% OSSLT pass rate · 1,890 students
7
72
St Paul Secondary SchoolMississauga · Catholic Secondary89% OSSLT pass rate · 880 students
8
72
St Aloysius Gonzaga Secondary SchoolMississauga · Catholic Secondary89% OSSLT pass rate · 1,625 students
9
71
The Woodlands Secondary SchoolMississauga · Public Secondary93% OSSLT pass rate · 1,160 students
10
71
ÉSC Sainte-FamilleMississauga · Catholic Secondary92% OSSLT pass rate · 530 students
11
69
Cawthra Park Secondary SchoolMississauga · Public Secondary91% OSSLT pass rate · 1,085 students
12
67
Loyola Catholic Secondary SchoolMississauga · Catholic Secondary92% OSSLT pass rate · 950 students
13
67
Our Lady of Mount Carmel Secondary SchoolMississauga · Catholic Secondary86% OSSLT pass rate · 1,155 students
14
67
St. Joan of Arc Catholic Secondary SchoolMississauga · Catholic Secondary86% OSSLT pass rate · 1,015 students
15
64
Port Credit Secondary SchoolMississauga · Public Secondary91% OSSLT pass rate · 1,370 students
16
62
Philip Pocock Catholic Secondary SchoolMississauga · Catholic Secondary91% OSSLT pass rate · 1,230 students
17
56
Applewood Heights Secondary SchoolMississauga · Public Secondary92% OSSLT pass rate · 1,140 students
18
55
St Martin Secondary SchoolMississauga · Catholic Secondary84% OSSLT pass rate · 1,090 students
19
54
Stephen Lewis Secondary SchoolMississauga · Public Secondary88% OSSLT pass rate · 1,225 students
20
53
Meadowvale Secondary SchoolMississauga · Public Secondary84% OSSLT pass rate · 1,150 students
21
53
Erindale Secondary SchoolMississauga · Public Secondary87% OSSLT pass rate · 1,005 students
22
52
Mississauga Secondary SchoolMississauga · Public Secondary88% OSSLT pass rate · 1,000 students
23
50
Iona Secondary SchoolMississauga · Catholic Secondary83% OSSLT pass rate · 655 students
24
48
Glenforest Secondary SchoolMississauga · Public Secondary89% OSSLT pass rate · 1,120 students
25
45
Clarkson Secondary SchoolMississauga · Public Secondary84% OSSLT pass rate · 740 students
26
43
Rick Hansen Secondary SchoolMississauga · Public Secondary83% OSSLT pass rate · 1,415 students
27
27
John Cabot Catholic Secondary SchoolMississauga · Catholic Secondary76% OSSLT pass rate · 835 students
28
24
Father Michael Goetz Secondary SchoolMississauga · Catholic Secondary80% OSSLT pass rate · 1,140 students
29
22
West Credit Secondary SchoolMississauga · Public Secondary41% OSSLT pass rate · 385 students
30
20
Lincoln M. Alexander Secondary SchoolMississauga · Public Secondary80% OSSLT pass rate · 835 students
31
19
T. L. Kennedy Secondary SchoolMississauga · Public Secondary85% OSSLT pass rate · 660 students
32
16
Ascension of Our Lord Secondary SchoolMississauga · Catholic Secondary69% OSSLT pass rate · 655 students
33
14
St. Oscar Romero SchoolMississauga · Catholic Secondary40% OSSLT pass rate · 285 students

#	School	Sector	Success Index (Canada)	Key result	Students
1	Lorne Park Secondary School Mississauga · Secondary · Grades 9-12	Public	86.2 Top 5%	96% OSSLT pass rate	795
2	John Fraser Secondary School Mississauga · Secondary · Grades 9-12	Public	81.9 Top 10%	95% OSSLT pass rate	1,715
3	St Marcellinus Secondary School Mississauga · Secondary · Grades 9-12	Catholic	76.6 Top 25%	91% OSSLT pass rate	1,715
4	St Joseph Secondary School Mississauga · Secondary · Grades 9-12	Catholic	75.8 Top 25%	91% OSSLT pass rate	1,185
5	Streetsville Secondary School Mississauga · Secondary · Grades 9-12	Public	74.2 Top 25%	91% OSSLT pass rate	810
6	St Francis Xavier Secondary School Mississauga · Secondary · Grades 9-12	Catholic	72.1 Top 25%	91% OSSLT pass rate	1,890
7	St Paul Secondary School Mississauga · Secondary · Grades 9-12	Catholic	71.8 Top 25%	89% OSSLT pass rate	880
8	St Aloysius Gonzaga Secondary School Mississauga · Secondary · Grades 9-12	Catholic	71.5 Top 25%	89% OSSLT pass rate	1,625
9	The Woodlands Secondary School Mississauga · Secondary · Grades 9-12	Public	71.2 Top 25%	93% OSSLT pass rate	1,160
10	ÉSC Sainte-Famille Mississauga · Secondary · Grades 9-12	Catholic	70.6 Top 25%	92% OSSLT pass rate	530
11	Cawthra Park Secondary School Mississauga · Secondary · Grades 9-12	Public	68.9 Top 25%	91% OSSLT pass rate	1,085
12	Loyola Catholic Secondary School Mississauga · Secondary · Grades 9-12	Catholic	67.3 Top 50%	92% OSSLT pass rate	950
13	Our Lady of Mount Carmel Secondary School Mississauga · Secondary · Grades 9-12	Catholic	66.9 Top 50%	86% OSSLT pass rate	1,155
14	St. Joan of Arc Catholic Secondary School Mississauga · Secondary · Grades 9-12	Catholic	66.5 Top 50%	86% OSSLT pass rate	1,015
15	Port Credit Secondary School Mississauga · Secondary · Grades 9-12	Public	64.4 Top 50%	91% OSSLT pass rate	1,370
16	Philip Pocock Catholic Secondary School Mississauga · Secondary · Grades 9-12	Catholic	61.8 Top 50%	91% OSSLT pass rate	1,230
17	Applewood Heights Secondary School Mississauga · Secondary · Grades 9-12	Public	55.5 Top 50%	92% OSSLT pass rate	1,140
18	St Martin Secondary School Mississauga · Secondary · Grades 9-12	Catholic	54.5 Top 50%	84% OSSLT pass rate	1,090
19	Stephen Lewis Secondary School Mississauga · Secondary · Grades 9-12	Public	53.6 Top 50%	88% OSSLT pass rate	1,225
20	Meadowvale Secondary School Mississauga · Secondary · Grades 9-12	Public	52.8 Top 50%	84% OSSLT pass rate	1,150
21	Erindale Secondary School Mississauga · Secondary · Grades 9-12	Public	52.6 Top 50%	87% OSSLT pass rate	1,005
22	Mississauga Secondary School Mississauga · Secondary · Grades 9-12	Public	52.3 Top 50%	88% OSSLT pass rate	1,000
23	Iona Secondary School Mississauga · Secondary · Grades 9-12	Catholic	49.8 Lower 50%	83% OSSLT pass rate	655
24	Glenforest Secondary School Mississauga · Secondary · Grades 9-12	Public	48.0 Lower 50%	89% OSSLT pass rate	1,120
25	Clarkson Secondary School Mississauga · Secondary · Grades 9-12	Public	44.7 Lower 50%	84% OSSLT pass rate	740
26	Rick Hansen Secondary School Mississauga · Secondary · Grades 9-12	Public	43.4 Lower 50%	83% OSSLT pass rate	1,415
27	John Cabot Catholic Secondary School Mississauga · Secondary · Grades 9-12	Catholic	26.9 Lower 50%	76% OSSLT pass rate	835
28	Father Michael Goetz Secondary School Mississauga · Secondary · Grades 9-12	Catholic	24.4 Lower 50%	80% OSSLT pass rate	1,140
29	West Credit Secondary School Mississauga · Secondary · Grades 9-12	Public	22.1 Lower 50%	41% OSSLT pass rate	385
30	Lincoln M. Alexander Secondary School Mississauga · Secondary · Grades 9-12	Public	20.0 Lower 50%	80% OSSLT pass rate	835
31	T. L. Kennedy Secondary School Mississauga · Secondary · Grades 9-12	Public	19.4 Lower 50%	85% OSSLT pass rate	660
32	Ascension of Our Lord Secondary School Mississauga · Secondary · Grades 9-12	Catholic	16.3 Lower 50%	69% OSSLT pass rate	655
33	St. Oscar Romero School Mississauga · Secondary · Grades 9-12	Catholic	13.9 Lower 50%	40% OSSLT pass rate	285

Lorne Park Secondary School in Mississauga leads the 2025 list of secondary schools in Mississauga with a Success Index (Canada) of 86.2. Of the 33 schools shown, 17 are public, 16 are catholic.

For the full picture see the wider Ontario secondary schools rankings, every school on the Mississauga page, or the comparison tool to put a shortlist side by side.

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Frequently asked questions

What is the best secondary school in Mississauga?

Lorne Park Secondary School in Mississauga, Ontario ranks first among secondary schools in Mississauga with a Success Index (Canada) of 86.2 out of 100 (Enrolment: 795).

How are secondary schools in Mississauga ranked?

Each school's Success Index (Canada) combines 8 factors: eqao grade 3 (reading, writing, maths) (20%), eqao grade 6 (reading, writing, maths) (25%), eqao grade 9 mathematics (25%), osslt first-attempt pass rate (20%), fsa literacy score (25%), fsa numeracy score (25%), community advantage (fewer low-income households) (10%), parent education (fewer parents without a credential) (10%). Each factor is a percentile against schools of the same type across Canada. Schools with fewer than 60 students are excluded from rankings.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official Canadian data (Ontario – School information and student demographics; BC Data Catalogue – Foundation Skills Assessment). Provinces publish different assessments, so scores are comparable within a province, not between provinces.