Planning area in Dublin

Castleknock–D15

Schools in County Dublin in this planning area.

Other planning areas in Dublin Lucan · 17 Killester–Raheny–Clontarf · 26 Cabra–Phibsboro–D7 · 22 Ballinteer–Stepaside–DLR · 16 Swords · 15 Tallaght · 18 Drumcondra–Marino–Dublin1 · 25 Donaghmede–Howth–D13 · 16 Firhouse–Oldbawn · 16 Dunlaoghaire · 14 Sallynoggin–Killiney–DLR · 15 Rathfarnham · 11 Clondalkin–D22 · 12 Dolphin's Barn–D12 · 17 Blanchardstown–West–D15 · 7 BlanchardstownVge–D15 · 11 Balbriggan · 11 Dublin–8 · 16 Dublin6–Clonskeagh · 13 Newcastle–Rathcoole · 8 Goatstown–Stillorgan–DLR · 10 Beaumont–CoolockD5 · 10 Dublin–6w · 7 Dublin2–Dublin4 · 12 Ballyfermot–D10 · 11 Rush&Lusk · 8 FinglasEast–BallymunD11 · 10 Mulhuddart–Tyrrelstown–D15 · 7 Malahide–Nevinstown · 5 Whitehall–SantryD9 · 10 Carpenterstown–D15 · 3 Booterstown–Blackrock · 6 Portmarnock · 5 Skerries · 8 Scribblestown–FinglasWest · 10 Donabate · 4 Palmerstown–Ronanstown–D20–22 · 6 Ballybrack–Shankill–DLR · 5 Darndale–D17 · 5 Kilternan · 3 Ashbourne · 3 Blessington · 1

Schools: 4; of 459 in Dublin
Pupils: 1,582; 1% of Dublin's pupils
Since 2015/16: −14.3%; 1,846 pupils in 2015/16
Average school size: 395.5; Dublin: 289.6
Average class size: 24.19; Dublin: 22.23

Trends in Castleknock–D15

Each year counts the schools in this planning area today, plus any that closed from 2023/24. Dotted lines bridge 1983/84 to 1992/93. 1974/75 is left out because that year's source file is missing five counties.

Earlier years are incomplete

The Department's files only record planning areas from 2023/24, so schools that closed or amalgamated before then aren't counted in any area. The further back you go, the more pupils are missing, and an amalgamation can look like a sudden rise. Across County Dublin, schools with no planning area had 1.5% of pupils in 2015/16, 5.3% in 2005/06 and 36.8% in 1975/76. Known data issues

Pupils

1,582

−70 on 2024/25

1975/762025/26

Schools

3 in 1975/76

1975/762025/26

Average pupils per school

395.5

322.0 in 1975/76

1975/762025/26

Average class size

24.19

−1.26 on 2024/25

2006/072025/26

Pupils in these schools

Junior infants, girls and boys, and Irish-medium schools over time, for the same schools as the trends above.

Area figures by year (CSV) Each school by year (CSV)

Junior infants

Pupils starting school each year. Class-by-class figures start in 2020/21. 175 in 2025/26, −1 on 2024/25.

Girls and boys

From 1976/77: earlier files don't split every school's pupils into girls and boys.

Irish-medium schools

No school in this area teaches all subjects through Irish.

Growing and falling since 2015/16

Each school's change in pupils over 10 years, from 2015/16 to 2025/26. A change of 10% or more either way counts as growing or falling.

Every school's change

4 schools with figures for both years

3fell by 10% or more

1within 10%

0grew by 10% or more

Down 25% or more · 1Down 10 to 25% · 2Within 10% · 1Up 10 to 25% · 0Up 25% or more · 0

Sort the table below by the change column to see which schools grew or fell most.

Class sizes

Mainstream class groups only. The source does not identify which standard/year group each class group belongs to.

Average class size: 24.19
Mainstream classes: 64
Classes of 30 or more: 1
Schools with a class of 30+: 1

Teachers

Teachers in the 4 mainstream primary schools here, 2006/07 to 2025/26. Class teachers are counted every year; all teaching posts where they're known.

How we count teachers

Class teachers in 2025/26: 64; Up 9 since 2006/07, while pupils fell 1%
Teaching posts in 2025/26: about 96; Estimate: 64 class teachers, 5 principals and deputies, 21 special education and 6 special class teachers
Teachers in 2015/16: 94; The Department's last count of every teacher
Since 2024/25: 0 / 0; 0 schools gained a class teacher, 0 lost one

Class teachers since 2006/07

One for each mainstream class, every school year

Special schools and special classes

1 special school in Castleknock–D15, and the special classes in its 4 mainstream schools. Special schools aren't counted in the pupils, class sizes or teachers above.

All special schools

Pupils in special schools: 163; In 1 school, up from 155 in 2015/16
Special classes in 2025/26: 6; In 3 of 4 schools. 2 in 2020/21
Allocated for 2026/27: 6; In 3 schools
Autism classes: 6; 100% of special classes

Special classes since 2020/21

In Castleknock–D15's mainstream schools, from the NCSE's yearly lists

2020/21 2
2021/22 2
2022/23 4
2023/24 4
2024/25 4
2025/26 6
2026/27 6

2026/27, dashed: allocated for next year.

Special schools in Castleknock–D15
Special school	Pupils	Since 2015/16	Teaching posts	SNAs
St Michaels Spec SchoolDublin 20 · Mild general learning disability	163	+5.2%	22	25

Sources: Department of Education enrolment lists; NCSE special class lists and special school allocations (CC BY 4.0).

Schools

4 schools, largest first.

Change over

Select a column heading to sort

	Roll number
St Brigids MXD N SDublin 15	00697S	834	−12.2%	32	25.72	30	1
Castleknock Educate Together NSDublin 15	20098I	374	−14.4%	16	22.62	26	0
Scoil Naisunta ChnuachaDublin 15	18623M	198	−4.3%	8	24.75	29	0
Scoil MhuireDublin 20	17891J	176	−30.2%	8	20.62	28	0