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Together in Faith

Together, we are building communities of faith.


Welcome to Holy Trinity CSS!

Learn more about our outstanding athletics programs & recent championship wins!


Congratulations to our graduates!

Holy Trinity would like to congratulate our graduating class of 2017!



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  • Uniform Shop

    458 – Holy Trinity C.S.S., Cornwall Click on link for information poster regarding uniform sales.

  • Grade 8 “Take Flight” Celebration

    Our Grade 8 “Take Flight” Celebration will take place on Monday, June 24th at 1:30pm. We will celebrate our grade 8 students who will transition to high school in September.

  • Grade 12 Graduation

    Our Grade 12 Graduation will take place on Wednesday, June 26th at 2pm.

  • Course Selections for the 2019/2020 School Year

    Course selections for the 2019/2020 are due by the end of the day, Thursday, March 7th, 2019. Students will use myBlueprint to choose courses. Students will print of the Choices … Read more

  • Updated Exam Schedule

    Attention all students in grades 9 to 12. The exam and EQAO Grade 9 Math Assessment schedule has been updated. Students taking Grade 9 math this semester will write the … Read more

  • Important News – Tues. Jan. 8, 2019

    Due to a police investigation in Cornwall, CDSBEO schools in the City of Cornwall will be holding buses until Cornwall Police instruct that the Hold and Secure be lifted. At … Read more