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Holy Trinity Catholic School

60 Lorne Crescent
Sarnia, Ontario N7S 0C3

Phone: (519) 344-2110 Fax: (519) 344-3728

Bell Times

Start 9:00am
Break 11:05am - 11:45pm
Break 1:25pm - 2:05pm
Dismissal 3:20pm
To Report an Absence
please call 519-344-2110.
We are in School Bus Zone 2


Edsby Link

Learning at Home

Our Principal
Daniella Mancusi, Principal

Welcome to the Holy Trinity Catholic School website! 

Holy Trinity Catholic School is a kindergarten to grade 8 school located in southeast Sarnia.  Our school serves a diverse population and I am pleased to say that approximately 440 students and 45 staff members are proud to call Holy Trinity their home school.   With the support of St. Benedict Church right next to our school, we are a dynamic Catholic Community dedicated to providing an outstanding faith-based education.

At Holy Trinity Catholic School, we are committed to working with the parents and our greater community to provide the best learning environment for all of the students in our care.  Our staff members are dynamic and extremely dedicated as they strive to meet the needs of our students so that they can reach their potential.  Children learn by example so it is our responsibility to be outstanding role models in our daily lives. 

Over the past year, we have been making wonderful strides to within the school and community to incorporate 21st century learning skills and now is the time to make this progress visible.  This website (along with our twitter handle) will aim to keep students, parents and the greater community better informed of the wonderful things happening at Holy Trinity Catholic School.

We look forward to continuing our work within the community and hope that you enjoy browsing our updated website!

If you missed our kinderSTARt event … don’t worry!  You still have plenty of time to register. Parents and guardians can now submit the Kindergarten registration form directly online!

 It’s another option for you – choose the option that best suits you!

  • Visit the Board website at to complete then submit the registration form online.  You will be contacted by the school to confirm your registration.
  • Or, download the registration form to Adobe PDF, complete then email to
  • Or, contact your school and pick up a registration package.

We look forward to welcoming your child to Full Day Kindergarten next September!

If you have any questions, call the school at 519-344-2110.

Principal:  Daniella Mancusi         Vice Principal: Kerri Jordan

Get MS Office Free from your School

Microsoft Office 365 Education for Students is available for free to students who are enrolled with the St. Clair Catholic District School Board. Install Office on up to 5 PCs or Macs and on other mobile devices, including Android, iPad®, and Windows tablets. For additional information, click here.

St Patrick's Logo

St. Patrick's Catholic High School

1001 The Rapids Parkway
Sarnia, Ontario N7S 6K2
Phone: 519-332-3976 Fax: 519-383-7024

Privacy Advisory

Our families and staff enjoy opportunities to share some of their activities with parents and the school community through teams, clubs and special events. Many of these are ‘memory making’ for families and as such, photographs and videos are often taken.

We ask that families exercise their discretion when taking photographs or videos at school events and consider the privacy of other students who may also be present in those pictures. We would appreciate if families not upload images of students other than their own to the Internet (e.g. YouTube or Facebook). Your cooperation with this request is appreciated.

Community Use of Schools

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The St. Clair Catholic District School Board is committed to allowing our communities to use our schools for their events. For more information, click below to access the website for this program.

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Licensed Child Care Programs