St. Mildred's-Lightbourn School, A Private All-Girls School, Oakville, ON

We Know How Girls Learn

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We Know How Girls Learn

Book a Private Tour or Discovery Call

Where girls thrive.

"I am amazed at the impact that SMLS has had on our daughter.

I think this is the first time she felt 'seen' by her educators, and as a result, she is actually seeing herself, and her possibilities, more clearly than ever.”
- Middle School parent

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135+

years of experience in leading girls' education
1st

all-girls robotics team in canada
260+

Offers of Admission from Leading Universities for the Class of 2026
40+

athletics teams
5

unique signature programs
50+

clubs and councils
510+

students across 3 divisions
9

advanced placement courses offered each year

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Our SMLS Values

At SMLS, we engage each girl in a personalized, real-world learning experience, where she explores her unique pathways in a nurturing community.

Experience Our School

List of 3 news stories.

Outdoor Learning in Action: JS2–JS4 at Mountsberg
11/9/2026

Our JS2, JS3, and JS4 Millies swapped their classrooms for the great outdoors at Mountsberg Conservation Area! From getting up close with real snakes and exploring the raptor centre to pond dipping for tadpoles and playing a high-stakes game of "Instincts for Survival," our Junior School students brought their science units to life.

Read more about each Grades day at Mountsberg below:

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Holly Burrows Journey From SMLS to Global Health
11/5/2026

The COVID 19 pandemic gave millions of people experiences they’d never have imagined, like lockdowns and isolation. At the same time, it’s safe to say that everyone’s experience was different. Very few people lived through it quite the way Holly Burrows ’13 did. When COVID 19 first hit global headlines, she was already in the thick of it as a master’s student in epidemiology at Yale University. Holly’s journey to Yale and where she’s been since, is a story that highlights just how far SMLS can launch you.

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Millies Lead at COSSOT Conference
11/5/2026

Over 100 students from twelve single-sex schools gathered on Saturday, Oct. 24 for the Middle School COSSOT Leadership Conference, co-hosted by SMLS and Upper Canada College (UCC).

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Come Visit Us Take the Next Steps

Discover how your daughter will benefit from SMLS's superior academic program, our attention to each girl's social, emotional and physical wellbeing, and student leadership development - all designed for girls.

Angel N., Class of 2023

“Through SMLS’s unique opportunities available to students, I was able to join SWAT 77 [the school’s robotics team] in Grade 8. This allowed me to learn more about and pursue my interest in STEMR. I have also found ways to become involved in the school community with the numerous leadership opportunities offered to students.”
Bisma B., Class of 2008

“Once you become a Millie, you are welcomed into a family, a community, and a network with deep and loving traditions…When I was a new entrepreneur, this community supported me. It provided mentorship from other alumnae who had been in business long before me. This community provided me with a network that I could rely on and a foundation to help me thrive.”
Claire B. Class of 2013

“SMLS is a community which offers all girls life-changing experiences to grow, build self-confidence, and to thrive academically. I started as a student in kindergarten and stayed all the way through to the end of Grade 12. SMLS was a safe place for me growing up, where I could be my true self and where I was welcomed warmly by all staff.”
Eva L, Class of 2022

“As a Senior School student, I had designated advisor times when I could meet with advisor teachers and have individual, one-on-one conversations. This is how I learned firsthand that, whenever I need help, there would always be someone in the SMLS community who could give me guidance.”
Jessica M., Class of 2023

“As I enter into my final year of high school…I get to think back now and count all of the things I love about SMLS. Things like our small class sizes, which mean we get the help and academic attention we deserve. I have always found my teachers to be caring and supportive and I can approach them with any questions or issues I may have. All the teachers and faculty members are amazing and all have the same goal of making students more successful.”
Katie D., Class of 2025

"In my time at St. Mildred’s-Lightbourn School, I have had so many fantastic experiences. I never feel scared to share my voice in the classroom, and I love being surrounded by courageous and confident women. I am constantly pushed out of my comfort zone, and exposed to leadership and learning opportunities. Across my extracurricular activities, I have made connections with students across the grades, and have built strong relationships with many of my teachers.”
Melanie P., Class of 2018

"SMLS prepares students to succeed in their post-secondary experiences and life beyond the pillars, through academic challenges such as AP courses, support such as extra help lessons and, most importantly, talented and dedicated teachers and the peers who surround you. I feel excited for what the future holds.”
Miranda P., Class of 2003

"I was taught that my ideas and voice mattered. I was taught to care for myself and others, both at school and in my community. We practised the joy that comes from supporting and lifting up other women, and it was so easy and natural to do.”
Paisley H. Class of 2023

“The impact that SMLS has had on me is substantial. SMLS Has both amazing opportunities as well as excellent staff that have helped guide me towards achieving my goals.”
Sena Y., Class of 2022

“As students here, we are able to receive a world-class education, with teachers who support us, encourage us to grow and chase our dreams. We have literature resources, experiential learning, STEMR opportunities, arts programs and sports facilities all at the tip of our fingers.”
Sophia T., Class of 2024

"For thirteen years, SMLS has pushed me to explore my horizons, make new connections, and discover my place in the world as an ambitious young woman."