Milliken Mills High School

Public · Secondary

7522 Kennedy Rd, Unionville, ON, L3R9S5

+1 (905) 477-0072

York Region District School Board

Official website

Grades 9-121,595 studentsopen

School information

Grades served: 9-12
Enrollment: 1,595
School organization: York Region District School Board

Academic Performance

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

secondary

8.4 / 10

Grade 9 Mathematics: 75%
Grade 10 OSSLT, first attempt: 90%

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

1,595 students in 2024-2025 — up 3% since 2011-2012. Roll as reported by Ontario, not a projection.

11–121,547
12–131,372
13–141,220
14–151,072
15–16995
16–17965
17–181,003
18–191,055
19–201,135
20–211,205
21–221,245
22–231,310
23–241,465
24–251,595

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.