Castleknock College
Dublin 15, Co. Dublin
771 studentsBoysFee-payingSecondaryTY
Work-to-rule: some evening events, including open nights, may not go ahead. Check with the school. What it means
Applying for September 2027
- Applications open
- Thursday, 1 October (passed)Online application only
- Applications close
- Thursday, 22 October, 2.45pmPayment link closes at 2.45pmAdd to calendar
- Offers by
- Friday, 13 NovemberAdd to calendar
- Accept by
- Friday, 27 NovemberAcceptance form must be completed and returnedAdd to calendar
From the school's website (1), the school's website (2), checked 17 October. Always confirm with the school.
Never miss a date. Get a notification the day before an open night, and before applications close.
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Students this year
771 students, by year group. Department of Education, 2025/26.
- 1st year
- 120
- 2nd year
- 121
- 3rd year
- 140
- TY
- 135
- 5th year
- 134
- 6th year
- 121
Transition Year: 135 students are in Transition Year, about as many as in 3rd year. That usually means most students take it. Ask whether it's optional.
What it costs
- Tuition fees
- €100 a year
From the school's website. What secondary school costs, and the schemes that help
At a glance
Castleknock College is a voluntary secondary school in Dublin 15, Co. Dublin (Eircode D15 PD95). Castleknock College has 771 students: 771 boys, according to the Department of Education's 2025/26 figures.
- Type
- Voluntary secondary school
- Boys and girls
- Boys only · 771 boys
- Fees
- Fee-paying
- Ethos
- Catholic
- Patron
- Congregation of the Missions (Vincentians)
- Language
- English-medium
- Day or boarding
- Day school
- DEIS
- No
- Roll number
- 60100Q
Inspection reports for this school from the Department of Education, on gov.ie
Explained: fee-paying or free · types of school · how to choose
Questions parents ask
- Where is Castleknock College?
- Castleknock College is a voluntary secondary school in Dublin 15, Co. Dublin (Eircode D15 PD95).
- How many students go to Castleknock College?
- Castleknock College has 771 students: 771 boys, according to the Department of Education's 2025/26 figures.
- Who is the principal of Castleknock College?
- Elaine Kelly is the principal of Castleknock College, according to the Department of Education's 2025/26 schools list.
- Is Castleknock College a mixed school?
- No. Castleknock College is a boys' school.
- Is Castleknock College fee-paying?
- Yes. Castleknock College is a fee-paying school. Check the school's website for this year's fees.
- What is the ethos of Castleknock College?
- Castleknock College has a Catholic ethos. Its patron is Congregation of the Missions (Vincentians).
- Does Castleknock College teach through Irish?
- No. Castleknock College teaches through English, with Irish taught as a subject.
- Does Castleknock College have Transition Year?
- 135 students are in Transition Year, about as many as in 3rd year. That usually means most students take it. Ask whether it's optional.
- Is Castleknock College a DEIS school?
- No. Castleknock College is not part of the DEIS programme.
- Where can I read Castleknock College's inspection reports?
- The Department of Education publishes school inspection reports on gov.ie. Search there by Castleknock College's roll number, 60100Q, or use the link on this page.
- What other secondary schools are near Castleknock College?
- The closest is Mount Sackville Secondary School. The table on this page compares the nearest schools by distance, size, type and fees.
Closest secondary schools
| School | Distance | Students | Boys and girls | Type | Fees | Next date | Irish-medium | DEIS |
|---|---|---|---|---|---|---|---|---|
| Castleknock CollegeThis school | 771 | Boys | Secondary | Fee‑paying | Applications close, Thu, 22 Oct | No | No | |
| Mount Sackville Secondary SchoolDublin 20 | 1.2 km | 636 | Girls | Secondary | Fee‑paying | Applications close, Wed, 21 Oct | No | No |
| Edmund Rice CollegeDublin 15 | 1.5 km | 912 | Mixed | Secondary | Free | None found yet | No | No |
| Castleknock Community CollegeDublin 15 | 1.5 km | 1,318 | Mixed | Community college (ETB) | Free | Applications close, Thu, 22 Oct | No | No |
| The Kings HospitalDublin 20 | 1.6 km | 732 | Mixed | Secondary | Fee‑paying | None found yet | No | No |
| Phobailscoil IosoldeDublin 20 | 2.3 km | 764 | Mixed | Community school | Free | None found yet | No | Yes |
| Le Cheile Secondary SchoolDublin 15 | 2.4 km | 944 | Mixed | Secondary | Free | Applications close, Thu, 22 Oct | No | No |
Straight-line distances. Compare with the two closest · See more schools near here.
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Contact
College RdCastleknock
Dublin 15
D15PD95
- Principal: Elaine Kelly on the Department of Education's 2025/26 schools list
- Phone: 01 821 3051
- Email: [email protected]
- Website: www.castleknockcollege.ie
- Open in Google Maps
Primary schools nearby
On our sister site, primaryschool.ie
- Scoil Naisunta Chnuacha800 m
- St Brigids Mixed NS900 m
- Scoil Mhuire1.1 km
- Scoil Thomais1.2 km
- Stewarts School1.3 km
Next school holidays
- In 9 daysOctober mid-term breakMon, 26 October to Fri 30 October 2026
- In 10 weeksChristmas holidaysWed 23 December 2026 to Tue 5 January 2027
- In 17 weeksFebruary mid-term breakMon, 15 February to Fri 19 February 2027
These dates are set for every secondary school in Ireland. Check with Castleknock College for any extra days off and the last day in June. Get reminders · All term dates · Add to Google Calendar