The Fall 50/50 Raffle is now LIVE!
The ALCDSB is excited to announce that the Fall 50/50 Raffle is live until 11:59 p.m. on Friday, November 20.
Archbishop O’ Sullivan Catholic School Home
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We strive to provide a distinctively Catholic education that allows each child the opportunities and experiences to grow in their academic capacity and faith formation. Within these experiences we focus on high expectations for all learners that are rooted in our Gospel teachings.
News & Announcements
See Me in ALCDSB Student Census Preliminary Report
In April 2026, the ALCDSB conducted the second iteration of the See Me in ALCDSB Student Census, inviting students in grades 4 to 12 to share information about their identities and lived experiences at school.
Anti-Hate Reporting Tool
New name, with the same goal!
Important information for Catholic ratepayers at election time
Learn how to direct your tax support to back publicly funded Catholic education in Ontario.
CEO Update - September
At the end of each month, the CEO will share an update with all families that celebrates the people, learning and achievements within our schools, while also providing important board-wide news and information.
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