Archbishop Denis O'Connor Catholic High School
80 Mandrake St · Ajax · L1S5H4 · Durham CDSB
Around Ajax, within 3 km, there are 9 secondary schools, Archbishop Denis O'Connor Catholic High School among them. Every school in and around Ajax →
What stands out about Archbishop Denis O'Connor Catholic High School
- Its 710 students sit close to the 810 of a middle secondary school in Ontario.
- On the measures with a value, it lands in the fourth fifth in Ontario.
- On Grade 9 math it reaches 49%, below the 55% in Ontario.
- Catholic and English-language, under Durham CDSB.
How Archbishop Denis O'Connor Catholic High School does on Ontario’s tests
EQAO’s Grade 3, 6 and 9 assessments and the literacy test, 2024-25: each school against every school in Ontario.
Archbishop Denis O'Connor Catholic High School reports 2 of 2 measures; on average they sit in the fourth fifth in Ontario.
| Measure | Here | Middle, Ontario | Band | 3-year change |
|---|---|---|---|---|
| Grade 9 math | 49% | 55% | Fourth fifth | −1 |
| Literacy test (OSSLT), first try | 85% | 85% | Middle fifth | −3 |
N/R: EQAO doesn’t report groups too small to keep students anonymous. The three-year change is in percentage points, as the ministry publishes it.
Where Archbishop Denis O'Connor Catholic High School sits among the province’s schools
Single schools aren’t lettered here; towns are. Archbishop Denis O'Connor Catholic High School is placed instead by its results against the other schools in Ontario, which puts it in the fourth fifth.
Ajax’s School Grade, on its Schools page, is where Archbishop Denis O'Connor Catholic High School counts towards a letter.
Getting a place at Archbishop Denis O'Connor Catholic High School
Registration happens with the board, not the school; the board names the school for the address.
Ontario’s Catholic boards are publicly funded. Their elementary schools generally ask that a parent or the child be Catholic; their high schools are open to all students.
The provinces’ education acts and the boards’ own admission policies; check with the board for a given address.
Side by side with the nearest secondary schools
Same-level schools nearby, nearest first, of every system.
5 of the 6 nearest secondary schools have more students than Archbishop Denis O'Connor Catholic High School.
| School | System | Language | Students | Band | Away |
|---|---|---|---|---|---|
| Archbishop Denis O'Connor Catholic High School | English Catholic | English | 710 | Fourth fifth | |
| Ajax High School | English public | English | 1,330 | Fourth fifth | 1.6 km |
| J Clarke Richardson Collegiate Institute | English public | English | 2,010 | Middle fifth | 2.9 km |
| Pickering High School | English public | English | 1,870 | Second fifth | 3 km |
| Notre Dame Catholic Secondary School | English Catholic | English | 1,065 | Middle fifth | 3 km |
| École secondaire Ronald-Marion | French public | French | 230 | Top fifth | 4.7 km |
| Donald A Wilson Secondary School | English public | English | 1,275 | Top fifth | 5.9 km |
Secondary schools near Archbishop Denis O'Connor Catholic High School
Nearest first, as the crow flies, up to 25 km. Each school’s own admission policy decides who gets a place.
Questions about Archbishop Denis O'Connor Catholic High School
Who runs Archbishop Denis O'Connor Catholic High School?
Durham CDSB runs Archbishop Denis O'Connor Catholic High School (English Catholic).
What language does Archbishop Denis O'Connor Catholic High School teach in?
English.
How do pupils get a place at Archbishop Denis O'Connor Catholic High School?
Choose a system, then register with its board; the address decides the school.
Which schools of the same kind are near Archbishop Denis O'Connor Catholic High School?
Closest by: Ajax High School (1.6 km), J Clarke Richardson Collegiate Institute (2.9 km) and Pickering High School (3 km).
Sources: Ontario Ministry of Education, School Information Finder 2024–25 and school contact list (Open Government Licence – Ontario) · Ontario Ministry of Education, School Information Finder 2024–25 (EQAO results; N/R where groups are too small). Open Government Licence – Ontario. · map tiles © OpenStreetMap contributors. Under the Statistics Canada Open Licence.
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).