Archbishop Denis O'Connor Catholic High School

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Archbishop Denis O'Connor Catholic High School
Archbishop Denis O'Connor Catholic High School.jpg
The front entrance of Archbishop Denis O'Connor Catholic High School.
80 Mandrake Street
Ajax, Ontario
L1S 5H4
Type Catholic school, high school
Motto Nil sine fide et labore
School district Durham Catholic District School Board
School number 703923
Principal Mr. D. Chambers
Grades 9-12
Enrolment Approximately 800-900 (2014)
Language Canadian English, and Canadian French
Campus Suburban
Colour(s)           Green and Yellow
Athletics Baseball, Soccer and Basketball
Uniform colours                Green, Grey, and White

Archbishop Denis O'Connor Catholic High School (abbreviated DO'C) is a Roman Catholic high school located in Ajax, Ontario, Canada, within the Durham Catholic District School Board. It is named for Archbishop Denis T. O'Connor, a priest who was born in Pickering in 1841, and who became the third Archbishop of Toronto, Ontario, Canada in 1899. The school has students in grades 912 and offers a wide range of academic and extracurricular activities. The current enrollment is approximately 800-900 students.[citation needed] The school colours are green and yellow, and its motto is Nil sine fide et labore, which is Latin for "Nothing without faith and work."

In 2014, the school celebrated the 50th anniversary of its opening in 1964.


Archbishop Denis O'Connor Catholic High School was founded by Father Leo J. Austin and was officially opened in September, 1962 in Whitby, Ontario.[citation needed] The school was moved to its new home of Ajax in 1984. In November 18, 1984 it was officially opened and blessed by Cardinal Carter.[citation needed] In 1991 a major addition was constructed which increased its capacity to approximately 1,000 students.[1]


The school is home to a wide variety of athletic and academic activities. It has highly talented sports teams, such as their senior boys basketball team and Varsity Boys Baseball Team. The senior boys' soccer team has proved to be one of the most successful teams in the Durham Region, winning five Lake Ontario Secondary School Association (LOSSA) championships in a row.[citation needed]

Feeder schools[edit]

The school's students generally come from the following Catholic Elementary Schools which are all located in Ajax:[citation needed]

  • St. Jude Catholic Elementary School
  • St. James Catholic Elementary School,
  • St. Francis de Sales Catholic Elementary School
  • St. Bernadette Catholic Elementary School
  • Mother Teresa Catholic Elementary School.

Notable alumni and groups[edit]

See also[edit]


  1. ^ Reflections in Time - Catholic Education in Durham Region (1969-1994), Pickering-Ajax Digital Archive Archived February 1, 2014, at the Wayback Machine.. Retrieved 2014-01-21

External links[edit]