St Theresa Catholic Secondary School

Public · Secondary

135 Adam St, Belleville, ON, K8N5S1

+1 (613) 968-6993

Algonquin and Lakeshore Catholic District School Board

Official website

Grades 9-12775 studentsopen

School information

Grades served: 9-12
Enrollment: 775
School organization: Algonquin and Lakeshore Catholic District School Board

Academic Performance

Scores compare similar schools only within Ontario, never across Canada.

secondary

4.3 / 10

Grade 9 Mathematics: 47%
Grade 10 OSSLT, first attempt: 84%

How Ontario assesses schools

EQAO, run by Education Quality and Accountability Office.

Ontario publishes provincial assessment results for individual schools.

Grades tested: 3, 6, 9, 10
Subjects: Reading, Writing, Mathematics, Literacy
Most recent year: 2024-2025

Results for this school

Secondary

Results published

A school without a score is not a school with a low score. Scores are only ever compared within Ontario and within the same stage — never between provinces, which use different tests.

Education Quality and Accountability Office

Enrolment over time

775 students in 2024-2025 — up 9% since 2011-2012. Roll as reported by Ontario, not a projection.

11–12708
12–13716
13–14718
14–15703
15–16739
16–17745
17–18723
18–19705
19–20705
20–21705
21–22735
22–23770
23–24785
24–25775

Some years are published as rounded or banded counts.

Programmes

Programmes Ontario lists for this school in 2025-2026. Only programmes the province publishes a register for can appear here, so this is not a full list of everything the school offers — and an absent programme does not mean it is not taught.