Best High Schools in Ajax, Ontario

6 schools ranked by EQAO Grade 9 Math and Grade 10 OSSLT · EQAO Performance Index

6 schools · ← All Ontario Secondary Schools

Local school searchCompare 6 Ajax high schools and secondary schools in one table.
City and Ontario rankUse local rank for nearby comparisons and Ontario rank for province-wide context.
Current leaderPickering High School is the top-ranked school on this page.
Ontario RankBoard RankCity RankSchoolBoardTypeOverall Score2023‑242022‑232021‑223‑Year ChangeWebsite
14131Pickering High SchoolDurham DSBPublic7.97.97.57.5+0.4 ↑Visit
22052J Clarke Richardson Collegiate InstituteDurham DSBPublic7.57.57.67.50.0 →Visit
24733Notre Dame Catholic Secondary SchoolDurham CDSBCatholic7.37.37.16.9+0.4 ↑Visit
49454Archbishop Denis O'Connor Catholic High SchoolDurham CDSBCatholic6.26.26.96.7-0.5 ↓Visit
498145Ajax High SchoolDurham DSBPublic6.26.26.36.9-0.7 ↓Visit
77486Father Donald MacLellan Catholic Sec Sch Catholic SchoolDurham CDSBCatholicVisit

Ranking Method

Ajax secondary schools are ranked with the School-Ranking.com EQAO Performance Index. The index uses official EQAO Grade 9 math and Grade 10 OSSLT results, shows the latest available score, and keeps recent-year scores and three-year change visible so readers can compare both performance and trend.

Frequently Asked Questions

What is the top-ranked secondary school in Ajax, Ontario?

Pickering High School is currently the top-ranked secondary school in Ajax on this page, based on the latest available EQAO Performance Index with an overall score of 7.9.

How are Ajax secondary schools ranked?

Ajax schools are ordered by Ontario rank and local city rank using official EQAO Grade 9 math and Grade 10 OSSLT results and the site EQAO Performance Index.

Can I compare public, Catholic, and French-language schools in Ajax?

Yes. The table includes the school board and school type where available, so local families can compare public, Catholic, French-language, and other public-system options together.

Does the city rank replace the Ontario rank?

No. City rank shows how a school compares locally, while Ontario rank shows its position across the full provincial dataset.