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Castleknock College

Post-primary · Voluntary secondaryCatholicBoysFee-paying

College Rd, Castleknock, Dublin 15 · D15 PD95 · Roll number 60100Q

Castleknock College is one of 24 post-primary schools in or within 3 km of Carpenterstown. Every school in and around Carpenterstown →

Pupils
771
September, 2025/26
Boys
Since 2019/20
+10%
from 701 pupils
Ireland: +5%
Ethos
Catholic
Patron: Congregation of the Missions (Vincentians)
Language
English
outside the Gaeltacht
Results
Not published
none school by school (Education Act 1998, s.53)
The gist

What stands out about Castleknock College

  • 771 pupils, near the middle for post-primary schools in Ireland (the median is 585).
  • About as many pupils as in 2019/20 (+10%).
  • Teaches through English, with Irish as a subject.
  • A boys’ school.
  • Charges fees.
  • A voluntary secondary school: owned by its trustees, most often a religious order or its successor trust, and paid for by the State.
  • Its patron is Congregation of the Missions (Vincentians); its ethos is Catholic.

Pupils over time

2015/16 to 2025/26

Castleknock College had 771 pupils in 2025/26, against 621 in 2015/16 (+24%). Its largest roll was 775, in 2024/25. Its roll rose in 8 of the 10 years.

02004006008002015/162018/192021/222025/26Pupils

Department of Education enrolments at 30 September each year; girls and boys where the lists give them.

No letter

No letter for Castleknock College

Ireland publishes no exam results school by school, and section 53 of the Education Act 1998 restricts comparing schools by them, so this school has no letter and nothing here ranks it. Its facts are the Department of Education’s; its inspection reports are linked below.

What the Department of Education does publish for Castleknock College is on this page: its pupils each September since 2015/16, girls and boys, its patron and ethos, whether it teaches through Irish, whether it is in DEIS, and its inspection reports.

Newspapers print lists of how many of a school’s leavers go on to college. Those count destinations, not exam results, and depend on who a school takes in; we don’t use them.

Inspections

Inspection reports on Castleknock College

The Department of Education’s Inspectorate visits schools and publishes its reports. The reports describe what inspectors saw; they give no overall grade, and we don’t make one. Reports for this school on gov.ie ↗

Inspectors visit every kind of school. Whole-school evaluations look at teaching and learning, leadership and management; subject inspections look at one subject; follow-through inspections check whether earlier advice was taken. Each report is published on gov.ie with the school’s response.

Getting in

Getting a place at Castleknock College

Every school admits under its own published admission policy; no admissions numbers are published.

Families apply to Castleknock College directly, usually in the year before their child finishes sixth class; the school’s yearly admission notice gives the dates for applying and for its decisions.

A school with more applicants than places admits on the criteria in its admission policy, often brothers and sisters, the area it serves and, for post-primary schools, its feeder primaries. A family refused a place can appeal.

It charges fees, set by the school. It takes boys only.

Pupils
771
September, 2025/26
Since 2019/20
+10%
from 701 pupils

No figures on applications are published, but the roll shows demand: Castleknock College has grown by 10% since 2019/20. All the schools around Carpenterstown together changed by −1%.

Pupils since 2019/20

Castleknock College+10%
The post-primary schools around Carpenterstown+15%
All Irish post-primary schools+15%

Education (Admission to Schools) Act 2018; Department of Education enrolments 2019/20 and 2025/26 (preliminary).

Side by side with the nearest post-primary schools

2025/26

The nearest schools of the same kind, as the crow flies: their pupils, ethos and language. No results: none are published.

Of the 6 nearest post-primary schools, 3 have more pupils than Castleknock College. Since 2019/20 its roll has changed by +10%; 3 of the 6 grew faster.

Castleknock College771
Mount Sackville636
Edmund Rice College912
Castleknock1,318
The Kings Hospital732
Phobailscoil Iosolde764
Le Cheile944
SchoolPupilsSince 2019/20EthosLanguageDEISAway
Castleknock College771+10%CatholicEnglish
Mount Sackville Secondary School636−3%CatholicEnglish1.2 km
Edmund Rice College912+576%CatholicEnglish1.5 km
Castleknock Community College1,318+13%Multi-denominationalEnglish1.5 km
The Kings Hospital732+3%Church of IrelandEnglish1.6 km
Phobailscoil Iosolde764−0%Inter-denominationalEnglish✓2.3 km
Le Cheile Secondary School944+26%CatholicEnglish2.4 km
The other 177 post-primary schools in Co. Dublin
SchoolPupilsSince 2019/20EthosLanguageDEISAway
St. Seton's Secondary School741–OtherEnglish✓2.8 km
Luttrellstown Community College1,027+15%Multi-denominationalEnglish2.8 km
Kylemore College479+22%Multi-denominationalEnglish✓2.8 km
Scoil Phobail Chuil Mhin1,014−1%Inter-denominationalEnglish2.9 km
St. Kevin's Community College525+41%Inter-denominationalEnglish✓3 km
Collinstown Park Community College630+11%Inter-denominationalEnglish✓3.5 km
Rath Dara Community College323+28%Inter-denominationalEnglish✓3.8 km
Blakestown Community School563+31%Inter-denominationalEnglish✓3.8 km
New Cross College417+110%CatholicEnglish✓4 km
St Dominics College790−1%CatholicEnglish4.1 km
St Declan's College651+0%CatholicEnglish4.4 km
Coláiste Mhuire272−4%CatholicAll in Irish✓4.4 km
Hartstown Community School1,120−1%Inter-denominationalEnglish4.4 km
Coláiste Phádraig CBS745+38%CatholicEnglish4.4 km
Coláiste Eoin257+43%Multi-denominationalEnglish✓4.5 km
Mercy Secondary School349+124%CatholicEnglish✓4.7 km
St Joseph's College934+6%CatholicEnglish4.9 km
St Michaels Secondary School646+4%CatholicEnglish✓4.9 km
Coláiste Cois Life592−27%Multi-denominationalAll in Irish4.9 km
Cabra Community College264+102%Multi-denominationalEnglish✓4.9 km
Kishoge Community College937+12%Multi-denominationalEnglish5.2 km
Griffeen Community College576+317%Multi-denominationalEnglish5.2 km
Our Lady Of Mercy Secondary School289−6%CatholicEnglish✓5.3 km
Meanscoil Iognáid Rís521−10%CatholicEnglish✓5.4 km
Coláiste Chilliain400−4%Multi-denominationalAll in Irish5.4 km
Coláiste Pobail Setanta1,079+2%Multi-denominationalEnglish5.5 km
Eriu Community College193–Multi-denominationalEnglish5.6 km
Hansfield ETSS867+34%Multi-denominationalEnglish5.7 km
Moyle Park College763+3%CatholicEnglish5.7 km
Assumption Secondary School270+8%CatholicEnglish✓5.7 km
Coláiste Bríde993+4%CatholicEnglish5.8 km
Lucan Community College966+5%Multi-denominationalEnglish5.9 km
Beneavin De La Salle College585+15%CatholicEnglish✓5.9 km
Deansrath Community College425+43%Inter-denominationalEnglish✓6 km
St Josephs Secondary School283+48%CatholicEnglish✓6 km
C.B.S. James Street251+65%CatholicEnglish✓6.1 km
St Vincents C.B.S. Glasnevin408+13%CatholicEnglish✓6.2 km
St Kevins College503−6%CatholicEnglish✓6.3 km
Loreto College320−20%CatholicEnglish✓6.4 km
St Mary's Secondary School830+2%CatholicEnglish✓6.4 km
St Pauls C.B.S.244+15%CatholicEnglish✓6.5 km
Clogher Road Community College297+46%Multi-denominationalEnglish✓6.7 km
Rosary College250+35%CatholicEnglish✓6.9 km
Kingswood Community College1,006+93%Multi-denominationalEnglish6.9 km
Mount Carmel Secondary School386−4%CatholicEnglish✓6.9 km
Presentation College262+55%CatholicEnglish✓7 km
Scoil Chaitriona523+11%CatholicAll in Irish✓7.1 km
Adamstown Community College981+8%Multi-denominationalEnglish7.2 km
St Pauls Secondary School466+4%CatholicEnglish✓7.2 km
Greenhills College186+36%Multi-denominationalEnglish✓7.2 km
Belvedere College S.J1,011+1%CatholicEnglish7.2 km
St Patricks Cathedral Grammar School302+39%Church of IrelandEnglish7.2 km
Trinity Comprehensive School564+15%CatholicEnglish✓7.5 km
Larkin Community College403+3%Inter-denominationalEnglish✓7.6 km
Coláiste de hÍde266−11%Multi-denominationalAll in Irish✓7.6 km
Christian Brothers, Synge St.256−3%CatholicEnglish✓7.7 km
Harolds Cross Educate Together Secondary School437–Multi-denominationalEnglish7.8 km
O'Connell School222+8%CatholicEnglish✓7.9 km
St. Aidan's C.B.S.725+1%CatholicEnglish7.9 km
Dominican College799+7%CatholicEnglish7.9 km
Rosmini Community School139+16%Inter-denominationalEnglish✓8 km
Templeogue College637−6%CatholicEnglish8.1 km
Clonturk College968+182%Multi-denominationalEnglish8.1 km
St. Mary's College C.S.Sp., Rathmines500+17%CatholicEnglish8.2 km
Loreto College588+5%CatholicEnglish8.2 km
Catholic University School544+7%CatholicEnglish8.3 km
St Louis High School690+2%CatholicEnglish8.4 km
St Mac Dara's Community College915+7%Inter-denominationalEnglish8.4 km
Presentation Community College443+26%CatholicEnglish8.4 km
C.B.S. Westland Row205+52%CatholicEnglish✓8.4 km
Tallaght Community School840+10%Inter-denominationalEnglish✓8.4 km
Terenure College800+16%CatholicEnglish8.6 km
St Marks Community School931+12%Inter-denominationalEnglish✓8.7 km
Ellenfield Community College150+3%Multi-denominationalEnglish✓8.7 km
Maryfield College527−11%CatholicEnglish8.9 km
St Josephs C.B.S.310+20%CatholicEnglish✓9 km
Our Ladys School799+5%CatholicEnglish9 km
Stratford College189+28%JewishEnglish9 km
Marino College297+21%Multi-denominationalEnglish✓9.1 km
Árdscoil Rís563+4%CatholicEnglish9.3 km
Our Lady Of Mercy College407+6%CatholicEnglish✓9.4 km
Sandford Park School Ltd437+8%Inter-denominationalEnglish9.4 km
The High School811+11%Church of IrelandEnglish9.4 km
Old Bawn Community School1,024+12%Inter-denominationalEnglish9.4 km
St Aidan's Community School561+28%Inter-denominationalEnglish✓9.6 km
St Conleths College339+19%CatholicEnglish9.6 km
Mount Temple Comprehensive School903+2%Church of IrelandEnglish9.7 km
Gonzaga College576+4%CatholicEnglish9.8 km
Muckross Park College709+0%CatholicEnglish9.9 km
Ringsend College191+1%Multi-denominationalEnglish✓10 km
St. David's College550+8%CatholicEnglish✓10 km
Loreto High School625−5%CatholicEnglish10 km
Alexandra College664+13%Church of IrelandEnglish10 km
Marian College319−8%CatholicEnglish✓10 km
Coláiste Éanna618+3%CatholicEnglish10 km
Sancta Maria College577+5%CatholicEnglish10 km
Gaelcholáiste an Phiarsaigh296+13%Multi-denominationalAll in Irish10 km
Firhouse Community College825+2%Inter-denominationalEnglish10 km
Mount Seskin Community College350+8%Inter-denominationalEnglish✓10 km
Killinarden Community School471−3%Inter-denominationalEnglish✓10 km
Coláiste pobail Fóla758–Multi-denominationalEnglish10 km
De La Salle College463+45%CatholicEnglish11 km
St. Colmcille's Community School727−0%Inter-denominationalEnglish11 km
Coolock Community College205+32%Multi-denominationalEnglish✓11 km
The Teresian School230+16%CatholicEnglish11 km
Sandymount Park Educate Together Secondary School437+460%Multi-denominationalEnglish11 km
St Marys Secondary School320+0%CatholicEnglish✓11 km
Chanel College451−21%CatholicEnglish✓11 km
Holy Faith Secondary School647+0%CatholicEnglish11 km
St Michaels College731+10%CatholicEnglish11 km
Firhouse Educate Together Secondary School411+407%Multi-denominationalEnglish11 km
Mercy College Coolock402−6%CatholicEnglish✓11 km
Our Lady's Grove Secondary School295−3%CatholicEnglish12 km
St Pauls College650+10%CatholicEnglish12 km
St Kilian's Deutsche Schule475+18%Inter-denominationalEnglish12 km
Ballinteer Community School415+2%Inter-denominationalEnglish✓12 km
Goatstown Educate Together Secondary School366–Multi-denominationalEnglish12 km
Loreto College655+4%CatholicEnglish13 km
Holy Family Community School998+4%Inter-denominationalEnglish13 km
Rockbrook Park School186+14%CatholicEnglish13 km
Mount Anville Secondary School726+4%CatholicEnglish13 km
St. Tiernan's Community School368+7%Inter-denominationalEnglish✓13 km
Manor House School652−5%CatholicEnglish13 km
Coláiste Eoin517+4%CatholicAll in Irish13 km
Wesley College942+2%MethodistEnglish13 km
St Andrews College1,011+2%PresbyterianEnglish13 km
St Columba's College357+7%Church of IrelandEnglish13 km
Coláiste Íosagáin488+1%CatholicAll in Irish13 km
The Donahies Community School488+4%Inter-denominationalEnglish✓13 km
Coláiste Choilm421−23%CatholicEnglish13 km
Árdscoil La Salle289+74%CatholicEnglish✓13 km
Willow Park School206−0%CatholicEnglish13 km
Swords Community College952+473%Multi-denominationalEnglish13 km
St Benildus College949+18%CatholicEnglish14 km
Belmayne Educate Together Secondary School595+1,883%Multi-denominationalEnglish14 km
Blackrock College1,041+2%CatholicEnglish14 km
Oatlands College623+14%CatholicEnglish14 km
Dominican College521+19%CatholicEnglish14 km
Fingal Community College864+1%Inter-denominationalEnglish14 km
St Finians Community College671+4%Multi-denominationalEnglish✓14 km
St Raphaela's Secondary School637+12%CatholicEnglish14 km
Malahide & Portmarnock Secondary School696+939%Multi-denominationalEnglish14 km
Grange Community College553+98%Inter-denominationalEnglish✓14 km
Gaelcholáiste Reachrann453+2%Inter-denominationalAll in Irish14 km
Rosemont School307+69%CatholicEnglish15 km
Newpark Comprehensive School884+3%Church of IrelandEnglish16 km
Pobalscoil Neasáin831+7%Inter-denominationalEnglish16 km
St Marys Secondary School230−16%CatholicEnglish16 km
Malahide Community School1,250+3%Inter-denominationalEnglish16 km
Rockford Manor Secondary School273−1%CatholicEnglish16 km
Loreto College Foxrock660+27%CatholicEnglish17 km
Stepaside Educate Together Secondary School741+246%Multi-denominationalEnglish17 km
St. Fintan's High School714+1%CatholicEnglish17 km
Portmarnock Community School955+3%Inter-denominationalEnglish17 km
Christian Brothers College549+7%CatholicEnglish17 km
Clonkeen College635+10%CatholicEnglish18 km
Santa Sabina Dominican College754+13%CatholicEnglish18 km
Sutton Park School503+36%Church of IrelandEnglish18 km
Holy Child Community School275+12%Inter-denominationalEnglish✓19 km
Rathdown School364+38%Church of IrelandEnglish19 km
Cabinteely Community School512+12%Inter-denominationalEnglish✓19 km
St Joseph Of Cluny Secondary School270+7%CatholicEnglish20 km
Blackrock Educate Together Secondary School236–Multi-denominationalEnglish20 km
Donabate Community College799+5%Multi-denominationalEnglish20 km
St Laurence College302+17%CatholicEnglish✓20 km
Loreto Abbey Secondary School757+16%CatholicEnglish20 km
Holy Child Killiney382+9%CatholicEnglish21 km
John Scottus Secondary School211+77%Inter-denominationalEnglish23 km
Lusk Community College1,104+61%Multi-denominationalEnglish23 km
Woodbrook College623+51%CatholicEnglish✓24 km
St Joseph's Secondary School945+19%CatholicEnglish✓25 km
Bremore Educate Together Secondary School824+124%Multi-denominationalEnglish28 km
Coláiste Ghlór na Mara520+63%Multi-denominationalAll in Irish29 km
Ardgillan Community College1,014+6%Multi-denominationalEnglish29 km
Skerries Community College1,025+5%Inter-denominationalEnglish29 km
Balbriggan Community College686+33%Inter-denominationalEnglish✓30 km
Loreto Secondary School1,220−5%CatholicEnglish30 km
Living nearby

Living in Carpenterstown

The town’s figures, not this street’s.

Median sale price
€394,000
66 sales, 2023–25, Property Price Register
Average rent
€1,820
a month, new tenancies in 2025

Homes in the D15 Eircode area

Housing in Carpenterstown →

The median sale price rose from €370,000 in 2023 to €441,500 in 2025 (+19%).

2023€370,000
2024€430,000
2025€441,500

New against second-hand, 2023 to 2025

New homes€482,800
Second-hand homes€381,000

Property Price Register sales in the D15 Eircode routing area, 2023 to 2025.

Renting in Carpenterstown

Cost of living in Carpenterstown →

New tenancies in Carpenterstown averaged €1,820 a month in 2025, against €1,699 in 2024 (+7%).

2024€1,699
2025€1,820

Residential Tenancies Board rent index, new tenancies, 2024 and 2025.

Carpenterstown, D15 PD95

Nearby

Post-primary schools near Castleknock College

Nearest first, as the crow flies, up to 25 km. Each school’s own admission policy decides who gets a place.

Questions about Castleknock College

Is Castleknock College a good school?

We don’t grade it: Ireland publishes no exam results school by school, and section 53 of the Education Act 1998 restricts comparing them. Its inspection reports on gov.ie, a visit and a talk with the principal will tell you more than any table could.

How many pupils does Castleknock College have?

771 pupils in 2025/26. That is +10% since 2019/20.

Does Castleknock College teach through Irish?

No: Castleknock College teaches in English, with Irish as a subject.

Who runs Castleknock College?

Castleknock College has a Catholic ethos. Its patron is Congregation of the Missions (Vincentians).

How do pupils get a place at Castleknock College?

Apply to the school directly. It publishes an admission policy and a yearly admission notice with its dates; if more children apply than it has places, it admits on the criteria in its policy.

Which schools of the same kind are near Castleknock College?

The nearest are Mount Sackville Secondary School (1.2 km), Edmund Rice College (1.5 km) and Castleknock Community College (1.5 km).

Sources: Department of Education, school lists 2025/26 (preliminary) and enrolments since 2015/16, CC BY 4.0 · inspection reports on gov.ie, linked by roll number. Under Creative Commons Attribution 4.0 (CC BY 4.0).

Facts from the Department of Education’s school lists. Listed with Carpenterstown; nothing here rates the school.

Contains Central Statistics Office (CSO) data, Census 2022, and Tailte Éireann boundaries (CSO Urban Areas, Small Areas, local electoral areas, constituencies), under Creative Commons Attribution 4.0 (CC BY 4.0).