Milliken Mills High School
🇨🇦 Official data · 2025Unionville, Ontario L3R9S5 · York Region DSB
#278 of 766 secondary schools in Ontario
#278 of 766 nationally
About Milliken Mills High School
Milliken Mills High School is a public secondary school located in Unionville, in the York Region DSB school board or district of Ontario, Canada. It caters for Grades 9-12. In 2025 it enrolled 1,595 students. Publicly funded schools run by public school boards or districts; free to attend.
Its Success Index (Canada) is 60.0 out of 100, placing it in the top 50% of secondary schools in Canada and 278th of 766 ranked secondary schools in Ontario. Its strongest component is eqao grade 9 mathematics (88th percentile), and its weakest is parent education (fewer parents without a credential) (4th percentile).
Other published figures: enrolment 1,595; first language not english 80%; special education 9%; identified as gifted 4%.
There are 16 schools in Unionville; Milliken Mills High School ranks 10th of 13 scored schools there.
Success Index (Canada) breakdown
Each component is a percentile against secondary schools across Canada.
- EQAO Grade 3 (reading, writing, maths) (20%)–
- EQAO Grade 6 (reading, writing, maths) (25%)–
- EQAO Grade 9 mathematics (25%)75%
- OSSLT first-attempt pass rate (20%)90%
- FSA literacy score (25%)–
- FSA numeracy score (25%)–
- Community advantage (fewer low-income households) (10%)11%
- Parent education (fewer parents without a credential) (10%)15%
The Success Index (Canada) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Milliken Mills High School by the official sources.
- Enrolment
- 1,595
- Students enrolled in the latest published year.
- EQAO Grade 9 maths
- 75%
- % at or above the provincial standard in Grade 9 mathematics.
- OSSLT pass rate
- 90%
- % passing the Grade 10 literacy test on the first attempt.
- Low-income households
- 11%
- % of students living in low-income households.
- Parents without a credential
- 15%
- % of students whose parents have no degree, diploma or certificate.
- First language not English
- 80%
- % of students whose first language is not English.
- Special education
- 9%
- % of students receiving special education services.
- Identified as gifted
- 4%
- % of students identified as gifted.
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Schools near Milliken Mills High School
Closest schools by straight-line distance, with their Success Index (Canada).
Aldergrove Public School
Unionville · Public elementary · Grades JK-8
630 students · 1.2 km away
St Benedict Catholic Elementary School
Unionville · Catholic elementary · Grades JK-8
355 students · 1.4 km away
Highgate Public School
Markham · Public elementary · Grades JK-8
520 students · 1.4 km away
Randall Public School
Markham · Public elementary · Grades JK-8
725 students · 1.5 km away
Milliken Mills Public School
Unionville · Public elementary · Grades JK-8
525 students · 1.6 km away
St Francis Xavier Catholic Elementary School
Markham · Catholic elementary · Grades JK-8
505 students · 1.6 km away
Port Royal Public School
Scarborough · Public elementary · Grades JK-8
345 students · 1.9 km away
Wilclay Public School
Markham · Public elementary · Grades JK-8
595 students · 1.9 km away
Kennedy Public School
Scarborough · Public elementary · Grades JK-8
550 students · 2.1 km away
Unionville Meadows Public School
Markham · Public elementary · Grades JK-8
770 students · 2.3 km away
Similar schools
Public secondary schools in Ontario with a comparable Enrolment.
Sir Frederick Banting Secondary School
London · Public secondary · Grades 9-12
1,590 students
Riverdale Collegiate Institute
Toronto · Public secondary · Grades 9-12
1,600 students
Maple High School
Maple · Public secondary · Grades 9-12
1,590 students
Iroquois Ridge High School
Oakville · Public secondary · Grades 9-12
1,585 students
Northview Heights Secondary School
Toronto · Public secondary · Grades 9-12
1,585 students
Bill Crothers Secondary School
Unionville · Public secondary · Grades 9-12
1,575 students
Frequently asked questions
Is Milliken Mills High School a good school?
Milliken Mills High School has a Success Index (Canada) of 60.0 out of 100 (Top 50% of secondary schools in Canada) and ranks #278 of 766 in Ontario. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Milliken Mills High School rank in Ontario?
Milliken Mills High School ranks #278 of 766 secondary schools in Ontario and #278 of 766 nationally on the Success Index (Canada) (2025 data).
How many students attend Milliken Mills High School?
Milliken Mills High School had 1,595 students in 2025.
Is Milliken Mills High School a elementary school or a secondary school?
Milliken Mills High School is classified as a secondary school covering Grades 9-12. It is a public school.
What other schools are near Milliken Mills High School?
There are 10 schools within 15 km of Milliken Mills High School; they are listed on this page with their Success Index (Canada) and distance, and can be compared side by side.