Licensed Child Care Centre
Upper Canada Child Care At St. John Xxiii Ces
125 Kreighoff Avenue, Unionville
0.1 km
Before & after school
Operator: Upper Canada Creative Child Care Centres Of Ontario
Licence #0003955·Child Care Centre
Catholic Elementary · Markham
St John XXIII Catholic Elementary School
125 Kreighoff Ave, Unionville, Ontario, L3R1V8 · York CDSB
Also written as St. John XXIII Catholic Elementary School · Saint John XXIII Catholic Elementary School
St John XXIII Catholic Elementary School is a York CDSB Catholic elementary school in Markham, serving JK-8. Homes in its catchment sit in Unionville and Village Green-South Unionville. Every home shown below falls inside the York CDSB-published attendance boundary — the same boundary the school board uses for enrolment.
Est. 1972
ProgramsFrench ImmersionRegular Track
- 71%
- EQAO composite
- JK-8
- Grades
- 290
- Students
- English
- Language
−11 pts vs Markham · −6 pts vs York CDSB — higher than 5 of the 73 other Markham elementary schools with published results
Grade 3Reading 50%Writing 56%Math 86%
Grade 6Reading 81%Writing 87%Math 68%
View all EQAO results (2024–2025)
Grade 3
Reading
50%
Markham elementary avg: 80%
Grade 3
Writing
56%
Markham elementary avg: 74%
Grade 3
Mathematics
86%
Markham elementary avg: 77%
Up 15 points since 2022–23
Grade 6
Reading
81%
Markham elementary avg: 94%
Down 15 points since 2022–23
Grade 6
Writing
87%
Markham elementary avg: 93%
Down 5 points since 2022–23
Grade 6
Mathematics
68%
Markham elementary avg: 74%
Down 5 points since 2022–23
Three-year change is published by the Ministry of Education: the difference in percentage points between the 2024–2025 and 2022–2023 assessments. Each assessment is written by a different group of students, and at a school this size a single grade is a few dozen students, so a few points can reflect who wrote it rather than a change at the school. EQAO does not report a result where fewer than 10 students wrote.
Six years of results
Every year the Ministry of Education has published for St John XXIII Catholic Elementary School, oldest first. Each year is a different group of students.
Grade 3 Reading50%
Grade 3 Writing56%
Grade 3 Mathematics86%
Grade 6 Reading81%
Grade 6 Writing87%
Grade 6 Mathematics68%
| Assessment | 2017-18 | 2018-19 | 2019-20 — no provincial assessment | 2020-21 — no provincial assessment | 2021-22 | 2022-23 | 2023-24 | 2024-25 |
|---|---|---|---|---|---|---|---|---|
| Grade 3 Reading | no result published | 100% | no assessment | no assessment | 40% | no result published | no result published | 50% |
| Grade 3 Writing | no result published | 80% | no assessment | no assessment | 40% | no result published | no result published | 56% |
| Grade 3 Mathematics | 63% | 96% | no assessment | no assessment | 76% | 71% | 81% | 86% |
| Grade 6 Reading | 95% | 94% | no assessment | no assessment | 100% | 96% | 90% | 81% |
| Grade 6 Writing | 95% | 88% | no assessment | no assessment | 100% | 92% | 90% | 87% |
| Grade 6 Mathematics | 70% | 81% | no assessment | no assessment | 81% | 73% | 69% | 68% |
Results are the percentage of students who met or exceeded the provincial standard, as published by the Ministry of Education. A dash means no result was published for that year: EQAO does not report a result where fewer than 10 students wrote. No provincial assessment ran in 2019-20 or 2020-21, so those years are blank for every school and are never joined across.
Informational — not a ranking.
Is an address zoned for this school?
Check any address against St John XXIII Catholic Elementary School’s attendance boundary.
Homes in this Catchment
Homes zoned for St John XXIII Catholic Elementary School, inside its attendance boundary.
Most homes for sale of the 70 ranked elementary catchments in Markham · median asking 59th-highest of 64 published · Full Markham catchment league
151 homes · median $798K · 31 days on market
The market inside this boundary
23 new in the last 7 days20 with a recorded price cut (13% of 151) · median cut $31K
| Type | For sale | Median asking | Median DOM |
|---|---|---|---|
| Detached | 35 | $2.0M | 27 days |
| Semi-detached | 2 | — | — |
| Townhouse | 18 | $1.3M | 23 days |
| Condo apartment | 97 | $598K | 33 days |
Active MLS® listings zoned inside St John XXIII Catholic Elementary School’s board-published regular-track boundary — matched per listing to the polygon, not by distance. Asking (list) prices, never sold prices; days on market count from each listing’s source date; “new” means listed within 7 days. A price cut is counted only when the reduction was observed while the listing was on DistrictIQ’s feed — a floor, not a census — and increases never count. Medians are blank below 5 listings. Boundaries as published by the board for the 2026-27 school year. DistrictIQ last downloaded it 2026-08-29. Listings refresh continuously.
See all 151 homes for sale in this catchment →
New homes appear inside this boundary most weeks.Get an email when one is listed
The rental market inside this boundary
28 new in the last 7 days
| Type | For rent | Median asking rent | Median DOM |
|---|---|---|---|
| Detached | 17 | $3,200 | 26 days |
| Semi-detached | 1 | — | — |
| Townhouse | 8 | $4,400 | 33 days |
| Condo apartment | 86 | $2,500 | 15 days |
Active MLS® rental listings zoned inside St John XXIII Catholic Elementary School’s board-published regular-track boundary — matched per listing to the polygon, not by distance. Asking (list) rents, never negotiated rents; days on market count from each listing’s source date; “new” means listed within 7 days. Medians are blank below 5 rentals. Boundaries as published by the board for the 2026-27 school year. DistrictIQ last downloaded it 2026-08-29. Listings refresh continuously.
All 115 homes for rent in this catchment
New homes appear inside this boundary most weeks.Get an email when one is listed
Communities in This Catchment
Location & Attendance Boundary
St John XXIII Catholic Elementary School attendance boundary· Boundaries can change — confirm with York CDSB.Open interactive map →
- Address
- 125 Kreighoff Ave, Unionville, Ontario, L3R1V8
- Phone
- 905-477-3288
- Website
- j23.ycdsb.ca
Property profiles in this catchment18 addresses
Address-level school zoning and neighbourhood data, available whether or not the home is listed.
- 5A Lunar Crescent
- 18 Bridleford Court
- 35 Cachet Parkway
- 101 Cathedral High Street #329 · 329
- 33 Cox Boulevard #1619 · 1619
- 2946 Elgin Mills Road
- 80 Eyer Drive
- 3 Ferndell Circle
- 12 McClary's Way
- 81 Prince Of Wales Drive
- 10 Rouge Valley Drive W #1215 · 1215
- 27 The Fairways Street
- 151 Upper Duke Crescent #305 · 305
- 18 Uptown Drive #229 · 229
- 1 Uptown Drive #605 · 605
- 1 Uptown Drive #910 · 910
- 292 Verdale Crossing #1716 · 1716
- 92 William Shearn Crescent
A sample of the addresses in this catchment with a property profile.
Licensed childcare nearby6 centres
Licensed centres closest to St John XXIII Catholic Elementary School — CWELCC status shown when it's published by the local service system manager.
6 licensed childcare centres nearby
Source: Ontario Ministry of Education licensed childcare data · Open Government Licence – Ontario · Last updated May 31, 2026
Compare Nearby Schools
The closest elementary schools by distance.
6 schools nearby
View all schools →Common questions
What is the St John XXIII Catholic Elementary School catchment?
The St John XXIII Catholic Elementary School catchment — also called its attendance boundary — is the area of addresses zoned for St John XXIII Catholic Elementary School by York CDSB. DistrictIQ maps the board-published boundary so you can check any address and browse the homes for sale inside it.
How do I check whether an address is zoned for St John XXIII Catholic Elementary School?
Enter the address in the boundary checker on this page — it tests the point against York CDSB's published attendance boundary for St John XXIII Catholic Elementary School and tells you whether the address is zoned for it. To check every school an address is zoned for at once, find your school by address. Always confirm current zoning with York CDSB before you buy or rent.
What grades does St John XXIII Catholic Elementary School serve?
St John XXIII Catholic Elementary School serves JK-8 (elementary). It is part of York CDSB.
Which school board runs St John XXIII Catholic Elementary School?
St John XXIII Catholic Elementary School is a York CDSB school. Board policies — including boundary changes, program eligibility and registration — are set by York CDSB, not by DistrictIQ.
Does St John XXIII Catholic Elementary School offer French Immersion or other program tracks?
St John XXIII Catholic Elementary School offers French Immersion and Regular Track. Program catchments can differ from the regular attendance boundary — confirm eligibility directly with York CDSB.
How many homes are for sale in St John XXIII Catholic Elementary School's catchment?
As of the latest listing sync there are 151 homes for sale and 115 homes for lease in St John XXIII Catholic Elementary School's catchment, with a median asking price of $798K. These are homes zoned for St John XXIII Catholic Elementary School, inside its attendance boundary — use the explorer above to switch between homes for sale and for lease.
More questions (8)
Are detached homes available in St John XXIII Catholic Elementary School's catchment?
Yes. 35 of the currently listed homes inside the catchment are detached properties. The overall median asking price for the shown set is $798K.
How are catchment homes determined for St John XXIII Catholic Elementary School?
These are active listings whose address falls inside St John XXIII Catholic Elementary School's attendance boundary, based on the board's published catchment. See the interactive polygon on the St John XXIII Catholic Elementary School catchment map. Boundaries and program eligibility (such as French Immersion) can change — always confirm current zoning directly with York CDSB.
Can school catchments change?
Yes. School boards periodically run boundary (accommodation) reviews and can redraw catchments as enrolment shifts or new schools open. DistrictIQ reflects York CDSB's current published boundary, but always confirm zoning directly with the board before making a purchase decision. How Ontario attendance boundaries work
Which Markham communities does St John XXIII Catholic Elementary School's catchment cover?
Homes in St John XXIII Catholic Elementary School's catchment are concentrated in Unionville and Village Green-South Unionville. Each community links to a dedicated page with neighbourhood-level market data.
How does St John XXIII Catholic Elementary School compare to other Markham elementary schools?
On the 2024–2025 EQAO assessments, 71% of St John XXIII Catholic Elementary School students met the provincial standard (composite) — higher than 5 of the 73 other Markham elementary schools with published results. EQAO is a benchmark of provincial-standard achievement, not a ranking of school quality; academic results are one factor among many.
How should I read the EQAO results for St John XXIII Catholic Elementary School?
EQAO results show the percentage of students who met or exceeded the provincial standard on each assessment, shown alongside the Markham elementary average for context. They are provided for information only and are not a ranking of school quality — academic outcomes are just one of many factors families may wish to consider.
How can I compare St John XXIII Catholic Elementary School to other schools in Markham?
Open the Compare tool to line up St John XXIII Catholic Elementary School against up to three other schools — EQAO results, grades, board and catchment status side by side.
Does living in St John XXIII Catholic Elementary School's catchment guarantee a spot?
Not automatically. Falling inside the attendance boundary is the basis for enrolment, but it is not an absolute guarantee — placement still depends on school capacity, program availability such as French Immersion, and board policy. Always confirm current school boundaries and registration directly with York CDSB.
Get new listings in St John XXIII Catholic Elementary School's catchment
See what's for sale inside St John XXIII Catholic Elementary School's attendance boundary — email only, no sales calls.
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Keep exploring
Keep researching around St John XXIII Catholic Elementary School — homes, communities and the wider Markham market.
School & assessment data
EQAO results are provided for informational purposes only and should not be interpreted as a ranking of school quality. Academic outcomes are only one factor families may wish to consider. EQAO results shown reflect the 2024–2025 assessment.
School and assessment data is sourced from the Ontario Ministry of Education, the Education Quality and Accountability Office (EQAO), Ontario Open Data, and the applicable public and Catholic district school boards across the regions we cover (Southern Ontario).
School information — including school boundaries, eligibility, EQAO results, programs and enrolment — is provided for general informational purposes only and may be inaccurate or out of date. Boundaries, eligibility, programs and enrolment can change at any time. EQAO figures reflect past assessment results, are shown per test relative to the city-wide average, are not a ranking, and do not predict any student's outcome. Always confirm current school boundaries and eligibility directly with the applicable school board before relying on this information.
Where our data comes from · source, licence and refresh cadence for every dataset.
Listing data is provided by the Toronto Regional Real Estate Board (TRREB) and PropTx under the Internet Data Exchange (IDX) program. The information is deemed reliable but is not guaranteed accurate by TRREB, PropTx, CREA or DistrictIQ Inc., Brokerage, may not reflect the most current status, and is subject to errors, omissions, prior sale, change, or withdrawal without notice. Listings should be independently verified.