Lord Dorchester Secondary School

Public · Secondary

61 Queen St, Dorchester, ON, N0L1G2

+1 (519) 268-7351

Thames Valley District School Board

Official website

Grades 9-12605 studentsopen

School information

Grades served: 9-12
Enrollment: 605
School organization: Thames Valley District School Board

Academic Performance

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

secondary

4.8 / 10

Grade 9 Mathematics: 63%
Grade 10 OSSLT, first attempt: 74%

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

605 students in 2024-2025 — up 3% since 2011-2012. Roll as reported by Ontario, not a projection.

11–12585
12–13552
13–14534
14–15491
15–16477
16–17463
17–18442
18–19460
19–20460
20–21525
21–22555
22–23620
23–24625
24–25605

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.