Largest Schools in Ottawa (2025)

Schools with the highest enrolment. Ranked by the Success Index (Canada) from official Canadian data; 100 schools in Ottawa, Ontario. Rank positions shown on each profile are within Canada and Ontario.

#	School	Sector	Enrolment	Success Index (Canada)	Key result	Students
1	Glebe Collegiate Institute Ottawa · Secondary · Grades 9-12	Public	1,315	78.9 Top 25%	93% OSSLT pass rate	1,315
2	Nepean High School Ottawa · Secondary · Grades 9-12	Public	1,270	82.9 Top 10%	94% OSSLT pass rate	1,270
3	Canterbury High School Ottawa · Secondary · Grades 9-12	Public	1,160	79.3 Top 25%	94% OSSLT pass rate	1,160
4	St Patrick's High School Ottawa · Secondary · Grades 9-12	Catholic	1,110	14.2 Lower 50%	75% OSSLT pass rate	1,110
5	École secondaire catholique Franco-Cité Ottawa · Secondary · Grades 9-12	Catholic	1,010	53.7 Top 50%	92% OSSLT pass rate	1,010
6	Lisgar Collegiate Institute Ottawa · Secondary · Grades 9-12	Public	960	69.6 Top 25%	91% OSSLT pass rate	960
7	École secondaire publique De La Salle Ottawa · Secondary · Grades 9-12	Public	950	70.3 Top 25%	93% OSSLT pass rate	950
8	Woodroffe High School Ottawa · Secondary · Grades 9-12	Public	900	25.8 Lower 50%	81% OSSLT pass rate	900
9	St Pius X High School Ottawa · Secondary · Grades 9-12	Catholic	890	37.3 Lower 50%	84% OSSLT pass rate	890
10	École secondaire catholique Paul-Desmarais Ottawa · Secondary · Grades 9-12	Catholic	880	94.4 Top 5%	99% OSSLT pass rate	880
11	Broadview Public School Ottawa · Elementary · Grades JK-8	Public	865	71.2 Top 25%	77.3% EQAO Grade 6	865
12	Ridgemont High School Ottawa · Secondary · Grades 9-12	Public	860	4.6 Lower 50%	62% OSSLT pass rate	860
13	École secondaire catholique Samuel-Genest Ottawa · Secondary · Grades 9-12	Catholic	855	61.8 Top 50%	96% OSSLT pass rate	855
14	Immaculata High School Ottawa · Secondary · Grades 9-12	Catholic	855	42.3 Lower 50%	87% OSSLT pass rate	855
15	St Joseph Intermediate School Ottawa · Elementary · Grades 7-8	Catholic	850	55.9 Top 50%	850 Enrolment	850
16	Vincent Massey Public School Ottawa · Elementary · Grades JK-8	Public	765	38.6 Lower 50%	75.3% EQAO Grade 6	765
17	Hopewell Avenue Public School Ottawa · Elementary · Grades JK-8	Public	740	92.1 Top 5%	92% EQAO Grade 6	740
18	St Paul High School Ottawa · Secondary · Grades 9-12	Catholic	700	44.2 Lower 50%	87% OSSLT pass rate	700
19	École élémentaire catholique Montfort Ottawa · Elementary · Grades JK-6	Catholic	690	39.3 Lower 50%	75% EQAO Grade 6	690
20	École élémentaire catholique Sainte-Geneviève Ottawa · Elementary · Grades JK-6	Catholic	685	58.8 Top 50%	81% EQAO Grade 6	685
21	Manor Park Public School Ottawa · Elementary · Grades JK-6	Public	680	22.4 Lower 50%	66.7% EQAO Grade 6	680
22	Chapman Mills Elementary School Ottawa · Elementary · Grades JK-6	Public	660	65.0 Top 50%	81% EQAO Grade 6	660
23	Agincourt Road Public School Ottawa · Elementary · Grades JK-8	Public	655	73.3 Top 25%	84.3% EQAO Grade 6	655
24	Alta Vista Public School Ottawa · Elementary · Grades JK-8	Public	655	50.2 Lower 50%	77.3% EQAO Grade 6	655
25	Brookfield High School Ottawa · Secondary · Grades 9-12	Public	650	16.5 Lower 50%	79% OSSLT pass rate	650
26	Fisher Park/Summit AS Public School Ottawa · Elementary · Grades 7-8	Public	620	52.7 Top 50%	620 Enrolment	620
27	Roberta Bondar Public School Ottawa · Elementary · Grades JK-8	Public	620	25.5 Lower 50%	71.3% EQAO Grade 6	620
28	St Nicholas Adult High School Ottawa · Secondary · Grades 9-12	Catholic	620	18.6 Lower 50%	620 Enrolment	620
29	Westwind Public School Ottawa · Elementary · Grades JK-6	Public	615	79.8 Top 10%	87% EQAO Grade 6	615
30	École élémentaire publique Charlotte Lemieux Ottawa · Elementary · Grades JK-6	Public	575	70.6 Top 25%	92% EQAO Grade 6	575
31	École intermédiaire catholique Pierre-Savard Ottawa · Elementary · Grades 7-8	Catholic	575	63.3 Top 50%	575 Enrolment	575
32	Elmdale Public School Ottawa · Elementary · Grades JK-6	Public	565	89.6 Top 5%	94.3% EQAO Grade 6	565
33	Woodroffe Avenue Public School Ottawa · Elementary · Grades JK-8	Public	550	77.6 Top 25%	91.3% EQAO Grade 6	550
34	École élémentaire publique Francojeunesse Ottawa · Elementary · Grades JK-6	Public	550	65.2 Top 50%	89.7% EQAO Grade 6	550
35	Vimy Ridge Public School Ottawa · Elementary · Grades JK-6	Public	550	56.6 Top 50%	74% EQAO Grade 6	550
36	Summerside Public School Ottawa · Elementary · Grades JK-8	Public	540	74.9 Top 25%	83.7% EQAO Grade 6	540
37	Pleasant Park Public School Ottawa · Elementary · Grades JK-6	Public	525	50.7 Lower 50%	86.3% EQAO Grade 6	525
38	École intermédiaire catholique Franco-Cité Ottawa · Elementary · Grades 7-8	Catholic	510	22.7 Lower 50%	510 Enrolment	510
39	Carleton Heights Public School Ottawa · Elementary · Grades JK-6	Public	505	2.7 Lower 50%	46% EQAO Grade 6	505
40	École élémentaire catholique Notre-Dame-des-Champs Ottawa · Elementary · Grades JK-6	Catholic	500	55.1 Top 50%	75.3% EQAO Grade 6	500
41	St Patrick's Intermediate School Ottawa · Elementary · Grades 7-8	Catholic	500	16.9 Lower 50%	500 Enrolment	500
42	École élémentaire catholique Sainte-Kateri Ottawa · Elementary · Grades JK-6	Catholic	490	76.5 Top 25%	84.7% EQAO Grade 6	490
43	Immaculata Intermediate School Ottawa · Elementary · Grades 7-8	Catholic	490	26.1 Lower 50%	490 Enrolment	490
44	Hillcrest High School Ottawa · Secondary · Grades 9-12	Public	460	25.9 Lower 50%	83% OSSLT pass rate	460
45	École intermédiaire catholique Paul-Desmarais Ottawa · Elementary · Grades 7-8	Catholic	455	86.7 Top 5%	455 Enrolment	455
46	École intermédiaire catholique Samuel-Genest Ottawa · Elementary · Grades 7-8	Catholic	455	11.1 Lower 50%	455 Enrolment	455
47	W.E. Gowling Public School Ottawa · Elementary · Grades JK-6	Public	450	14.2 Lower 50%	62% EQAO Grade 6	450
48	École élémentaire catholique Terre-des-Jeunes Ottawa · Elementary · Grades JK-6	Catholic	445	55.6 Top 50%	86.7% EQAO Grade 6	445
49	Bayview Public School Ottawa · Elementary · Grades JK-4	Public	435	57.5 Top 50%	72.7% EQAO Grade 3	435
50	Fielding Drive Public School Ottawa · Elementary · Grades 4-8	Public	435	30.0 Lower 50%	69% EQAO Grade 6	435
51	Pinecrest Public School Ottawa · Elementary · Grades JK-8	Public	435	4.5 Lower 50%	44% EQAO Grade 6	435
52	École élémentaire catholique d'enseignement personnalisé Édouard-Bond Ottawa · Elementary · Grades JK-6	Catholic	430	70.9 Top 25%	90.7% EQAO Grade 6	430
53	École élémentaire publique Michel-Dupuis Ottawa · Elementary · Grades JK-8	Public	430	50.3 Lower 50%	74.3% EQAO Grade 6	430
54	Notre Dame High School Ottawa · Secondary · Grades 9-12	Catholic	430	33.9 Lower 50%	83% OSSLT pass rate	430
55	Mutchmor Public School Ottawa · Elementary · Grades JK-6	Public	425	81.9 Top 10%	91.7% EQAO Grade 6	425
56	École élémentaire catholique Bernard-Grandmaître Ottawa · Elementary · Grades JK-6	Catholic	425	75.7 Top 25%	81.7% EQAO Grade 6	425
57	École élémentaire publique Séraphin-Marion Ottawa · Elementary · Grades JK-6	Public	415	58.8 Top 50%	81.7% EQAO Grade 6	415
58	Rockcliffe Park Public School Ottawa · Elementary · Grades JK-6	Public	410	65.9 Top 50%	80% EQAO Grade 6	410
59	Queen Elizabeth Public School Ottawa · Elementary · Grades JK-8	Public	405	16.2 Lower 50%	46.7% EQAO Grade 6	405
60	École élémentaire catholique d'enseignement personnalisé Lamoureux Ottawa · Elementary · Grades JK-8	Catholic	400	75.8 Top 25%	85% EQAO Grade 6	400
61	Holy Family Elementary School Ottawa · Elementary · Grades JK-6	Catholic	400	45.2 Lower 50%	78% EQAO Grade 6	400
62	Connaught Public School Ottawa · Elementary · Grades JK-6	Public	395	71.9 Top 25%	87% EQAO Grade 6	395
63	École élémentaire catholique George-Étienne-Cartier Ottawa · Elementary · Grades JK-6	Catholic	385	77.6 Top 25%	84.7% EQAO Grade 6	385
64	École élémentaire publique De la Salle Ottawa · Elementary · Grades 7-8	Public	385	37.5 Lower 50%	385 Enrolment	385
65	École élémentaire catholique Saint-François-d'Assise Ottawa · Elementary · Grades JK-6	Catholic	380	50.1 Lower 50%	81.7% EQAO Grade 6	380
66	D. Roy Kennedy Public School Ottawa · Elementary · Grades JK-8	Public	380	23.0 Lower 50%	54.3% EQAO Grade 6	380
67	St Paul Intermediate School Ottawa · Elementary · Grades 7-8	Catholic	375	27.1 Lower 50%	375 Enrolment	375
68	St Bernard Elementary School Ottawa · Elementary · Grades JK-6	Catholic	375	23.6 Lower 50%	69% EQAO Grade 6	375
69	Elgin Street Public School Ottawa · Elementary · Grades JK-6	Public	370	80.2 Top 10%	93.3% EQAO Grade 6	370
70	St Marguerite d'Youville Elementary School Ottawa · Elementary · Grades JK-6	Catholic	360	39.9 Lower 50%	73.3% EQAO Grade 6	360
71	École élémentaire publique Louise-Arbour Ottawa · Elementary · Grades JK-8	Public	350	63.5 Top 50%	83% EQAO Grade 6	350
72	École élémentaire catholique Marius-Barbeau Ottawa · Elementary · Grades JK-8	Catholic	335	35.1 Lower 50%	67.7% EQAO Grade 6	335
73	St Elizabeth Elementary School Ottawa · Elementary · Grades JK-6	Catholic	335	13.5 Lower 50%	59% EQAO Grade 6	335
74	Prince of Peace Elementary School Ottawa · Elementary · Grades JK-6	Catholic	335	9.5 Lower 50%	57.3% EQAO Grade 6	335
75	St. Gemma Elementary School Ottawa · Elementary · Grades JK-6	Catholic	330	67.4 Top 25%	81.3% EQAO Grade 6	330
76	St Brigid Elementary School Ottawa · Elementary · Grades JK-6	Catholic	330	20.2 Lower 50%	60% EQAO Grade 6	330
77	Ottawa Technical Secondary School Ottawa · Secondary · Grades 9-12	Public	330	10.0 Lower 50%	48% OSSLT pass rate	330
78	Severn Avenue Public School Ottawa · Elementary · Grades JK-6	Public	325	50.1 Lower 50%	87.3% EQAO Grade 6	325
79	École secondaire publique Omer-Deslauriers Ottawa · Secondary · Grades 9-12	Public	325	27.1 Lower 50%	88% OSSLT pass rate	325
80	Our Lady of Mount Carmel Elementary School Ottawa · Elementary · Grades JK-6	Catholic	325	15.7 Lower 50%	62.7% EQAO Grade 6	325
81	Glashan Public School Ottawa · Elementary · Grades 7-8	Public	315	59.2 Top 50%	315 Enrolment	315
82	Charles H. Hulse Public School Ottawa · Elementary · Grades JK-6	Public	315	4.3 Lower 50%	54% EQAO Grade 6	315
83	Hawthorne Public School Ottawa · Elementary · Grades JK-8	Public	315	3.5 Lower 50%	27.7% EQAO Grade 6	315
84	École élémentaire catholique Sainte-Anne Ottawa · Elementary · Grades JK-8	Catholic	305	56.6 Top 50%	87.3% EQAO Grade 6	305
85	Devonshire Community Public School Ottawa · Elementary · Grades JK-6	Public	300	69.5 Top 25%	85.3% EQAO Grade 6	300
86	St Augustine Elementary School Ottawa · Elementary · Grades JK-6	Catholic	300	57.8 Top 50%	82% EQAO Grade 6	300
87	Centennial Public School Ottawa · Elementary · Grades JK-8	Public	290	22.1 Lower 50%	64.3% EQAO Grade 6	290
88	St George Elementary School Ottawa · Elementary · Grades JK-6	Catholic	280	71.1 Top 25%	87.7% EQAO Grade 6	280
89	St Luke (Ottawa) Elementary School Ottawa · Elementary · Grades JK-6	Catholic	280	28.1 Lower 50%	74% EQAO Grade 6	280
90	École élémentaire publique Marie-Curie Ottawa · Elementary · Grades JK-6	Public	280	16.5 Lower 50%	50.7% EQAO Grade 6	280
91	Featherston Drive Public School Ottawa · Elementary · Grades JK-8	Public	275	20.3 Lower 50%	72.7% EQAO Grade 6	275
92	York Street Public School Ottawa · Elementary · Grades JK-8	Public	275	6.1 Lower 50%	53.3% EQAO Grade 6	275
93	Our Lady of Fatima Elementary School Ottawa · Elementary · Grades JK-6	Catholic	265	54.3 Top 50%	79.3% EQAO Grade 6	265
94	Robert Bateman Public School Ottawa · Elementary · Grades JK-6	Public	255	24.9 Lower 50%	71.3% EQAO Grade 6	255
95	Hilson Avenue Public School Ottawa · Elementary · Grades JK-6	Public	250	62.3 Top 50%	73.3% EQAO Grade 6	250
96	Notre Dame Intermediate School Ottawa · Elementary · Grades 7-8	Catholic	250	11.1 Lower 50%	250 Enrolment	250
97	École élémentaire catholique Jean-Robert-Gauthier Ottawa · Elementary · Grades JK-6	Catholic	240	84.7 Top 5%	85% EQAO Grade 6	240
98	Corpus Christi Catholic Elementary School Ottawa · Elementary · Grades JK-6	Catholic	225	61.4 Top 50%	74% EQAO Grade 6	225
99	Our Lady of Victory Elementary School Ottawa · Elementary · Grades JK-6	Catholic	225	36.9 Lower 50%	68.3% EQAO Grade 6	225
100	Holy Cross Elementary School Ottawa · Elementary · Grades JK-6	Catholic	215	35.2 Lower 50%	76.3% EQAO Grade 6	215

Glebe Collegiate Institute in Ottawa leads the 2025 list of largest schools in Ottawa with Enrolment 1,315. Of the 100 schools shown, 54 are public, 46 are catholic.

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

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Frequently asked questions

What is the best largest school in Ottawa?

Glebe Collegiate Institute in Ottawa, Ontario ranks first among largest schools in Ottawa with Enrolment 1,315 (Enrolment: 1,315).

How are largest schools in Ottawa ranked?

Schools with the highest enrolment. Only schools eligible for the Success Index (Canada) are included; the index is shown alongside for context.

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.