Local authority in Dublin

Dun Laoghaire Rathdown

Schools in County Dublin in this local authority.

Other local authorities in Dublin Dublin City Council · 192 Fingal County Council · 99 South Dublin County Council · 100

Schools: 68; of 459 in Dublin
Pupils: 20,151; 15% of Dublin's pupils
Average school size: 296.3; Dublin: 289.6
Average class size: 23.64; Dublin: 22.23

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

59 schools with figures for both years

Schools still filling their classes in 2015/16, and schools opened since, are listed separately.

24fell by 10% or more

27within 10%

8grew by 10% or more

Down 25% or more · 6Down 10 to 25% · 18Within 10% · 27Up 10 to 25% · 2Up 25% or more · 6

Grown most

Pupils in 2015/16 and 2025/26

1 St JosephsDun Laoghaire, Co. Dublin 135 → 370 +174.1%
2 St Kevins N SSallynoggin, Co. Dublin 161 → 229 +42.2%
3 Islamic National SchoolDublin 14, Co. Dublin 296 → 414 +39.9%
4 Holy Trinity National SchoolDublin 18, Co. Dublin 426 → 586 +37.6%
5 ST Olaf's National SchoolDublin 16, Co. Dublin 453 → 591 +30.5%

Fallen most

Pupils in 2015/16 and 2025/26

1 Booterstown BoysBlackrock, Co. Dublin 291 → 188 −35.4%
2 Scoil an Maighdine Mhuire BoysDublin 16, Co. Dublin 249 → 176 −29.3%
3 Na Maighdine Muire GirlDublin 16, Co. Dublin 281 → 200 −28.8%
4 Our Ladys N SDublin 14, Co. Dublin 245 → 176 −28.2%
5 Gaelscoil PhadraigBaile Breac, Co. Dublin 163 → 118 −27.6%

Ranked by percentage change. Only schools with 50 or more pupils in 2015/16 are ranked, leaving out any still filling their classes then, because a few pupils make a big percentage in a small or new school. An amalgamation or a new school nearby can also explain a big rise or fall.

Newer schools

9 schools still filling their classes in 2015/16 or opened since, with 2,483 pupils between them. They aren’t in the figures above.

Stepaside Educate Together National SchoolDublin 18 · opened 2012/13 542
Gaelscoil na FuinseoigeBác 14 · opened 2016/17 441
Ballinteer Educate Together National SchoolDublin 16 · opened 2012/13 399
Gaelscoil Shliabh RuaBaile Átha Cliath 18 · opened 2013/14 359
Cherrywood Educate Together National SchoolDublin 18 · opened 2020/21 220
Dun Laoghaire ETNSMonkstown · opened 2017/18 177
Goatstown Stillorgan Primary SchoolDublin 14 · opened 2019/20 170
Gaelscoil LaigheanBaile Átha Cliath 14 · opened 2019/20 130
Sallynoggin Educate Together National SchoolSallynoggin · opened 2022/23 45

Class sizes

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

Average class size: 23.64
Mainstream classes: 840
Classes of 30 or more: 48
Schools with a class of 30+: 19

Teachers

Teachers in the 68 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: 840; Up 227 since 2006/07, while pupils rose 27%
Teaching posts in 2025/26: about 1,262; Estimate: 840 class teachers, 63 principals and deputies, 311 special education and 48 special class teachers
Teachers in 2015/16: 1,043; The Department's last count of every teacher
Since 2024/25: 10 / 13; 10 schools gained a class teacher, 13 lost one

Class teachers since 2006/07

One for each mainstream class, every school year

Schools

68 schools, largest first.

Change over

Select a column heading to sort

	Roll number
The Harold SchoolGlasthule	20141G	642	−5.6%	27	23.56	28	0
ST Olaf's National SchoolDublin 16	19319O	591	+30.5%	23	25.70	27	0
Holy Trinity National SchoolDublin 18	20190T	586	+37.6%	24	24.42	26	0
Carysfort NSBlackrock	14586M	583	+7.0%	24	24.29	29	0
Stepaside Educate Together National SchoolDublin 18	20401G	542	+351.7%	24	22.08	26	0
Scoil Padraig Naofa BBlackrock	19258U	499	−22.9%	21	23.48	30	1
St Brigids Girls N SDublin 18	16353W	499	−8.4%	20	24.95	30	6
Scoil LorcáinBaile na Manach	18451J	485	−0.6%	19	25.53	31	9
St Patricks GNSDublin 18	19259W	478	−15.2%	20	23.90	35	2
Gaelscoil na FuinseoigeBác 14	20487T	441	–	17	25.59	31	5
St Annes MXD N SShankill	19888H	440	−13.9%	18	24.11	29	0
S N Cnoc AinbhilStillorgan	17979A	434	−6.9%	18	24.11	31	4
S N San TreasaMount Merrion	18647D	430	−5.7%	16	26.88	29	0
Oatlands Primary School, An Edmund Rice SchoolBlackrock	17954H	428	−0.7%	17	25.18	30	1
Monkstown Eucate Together NSDun Laoghaire	20060G	415	−5.3%	16	25.56	30	1
Islamic National SchoolDublin 14	19949B	414	+39.9%	17	24.00	30	1
Scoil na nAingealBlackrock	19335M	410	−11.4%	17	24.12	28	0
Our lady's Grove Primary SchoolDublin 14	19374W	409	−6.2%	16	25.56	29	0
St Brigids Boys N SDublin 18	16352U	406	−20.9%	16	25.38	28	0
Gaelscoil Thaobh na CoilleBaile Átha Cliath 18	20020R	402	−9.0%	17	23.65	28	0
Ballinteer Educate Together National SchoolDublin 16	20400E	399	+121.7%	16	24.19	27	0
Our Lady Good Counsel GNSDun Laoghaire	19321B	398	−13.5%	16	23.75	29	0
S N Naomh LorcanStillorgan	16893I	390	−12.2%	16	24.38	29	0
Our Lady of Good Counsel Boys N SDún Laoghaire	19320W	389	−10.0%	16	24.31	28	0
Taney N SDublin 14	15284B	384	−12.3%	16	24.00	28	0
St Raphaelas N SBlackrock	17470I	375	−20.4%	15	25.00	31	2
St Attractas Senior N SDublin 16	19716B	371	+6.9%	15	24.33	31	3
St JosephsDun Laoghaire	19938T	370	+174.1%	17	21.35	27	0
Gaelscoil Shliabh RuaBaile Átha Cliath 18	20425U	359	+529.8%	16	22.44	29	0
St Attractas Junior N SDublin 16	19537B	337	−2.6%	14	24.07	30	2
Loreto National SchoolDalkey	19066L	314	−16.9%	12	25.17	29	0
Our Lady of the Wayside NSDublin 18	18806U	292	−9.9%	12	24.33	27	0
Holy Cross N SDublin 14	19904C	260	+11.6%	11	23.64	28	0
Scoil MhuireDublin 18	19497P	249	−24.3%	12	20.25	27	0
Our Lady of Mercy Convent SchoolBooterstown	17970F	247	+1.2%	10	24.70	30	2
St. Mary's National SchoolDublin 18	02872U	242	−6.6%	10	24.20	30	1
Scoil NaithiBaile Átha Cliath 16	19437U	231	−4.1%	8	28.88	31	4
St Kevins N SSallynoggin	19979K	229	+42.2%	11	20.82	29	0
Queen of Angels Primary SchoolDublin 16	19723V	224	−10.8%	10	21.80	29	0
Cherrywood Educate Together National SchoolDublin 18	20535E	220	–	9	23.11	25	0
Dalkey School ProjectGlenageary	19612M	220	−8.3%	8	27.50	30	1
S N Gleann na gCaorach Iníon LéinínKilliney	19400U	211	−9.1%	9	23.44	27	0
Scoil Naisiunta an Dea AoireDublin 14	19939V	209	+15.5%	9	19.89	25	0
Kill-O'-The-Grange NSBlackrock	18886V	208	−4.6%	8	25.25	28	0
Kilternan Church of Ireland NSDublin 18	16629O	206	−11.2%	8	24.25	28	0
Rathmichael N SDublin 18	11873A	205	−3.3%	8	25.62	29	0
Na Maighdine Muire GirlDublin 16	19396J	200	−28.8%	9	21.56	28	0
Booterstown BoysBlackrock	06200O	188	−35.4%	8	22.75	29	0
Rathfarnham Educate TogetherDublin 14	19945Q	188	−15.7%	8	23.50	28	0
S N Padraig NaofaKiltiernan	17507F	185	0.0%	7	25.57	32	1
Clochar San DominicDun Laoghaire	05600C	184	−6.6%	10	17.20	21	0
Dun Laoghaire ETNSMonkstown	20503O	177	–	8	22.12	32	1
Our Ladys N SDublin 14	19922E	176	−28.2%	8	21.38	27	0
Scoil an Maighdine Mhuire BoysDublin 16	19314E	176	−29.3%	8	20.75	29	0
Goatstown Stillorgan Primary SchoolDublin 14	20523U	170	–	7	23.43	28	0
St Johns N SBallybrack	19960M	165	+7.8%	8	18.38	24	0
Holy Family SchoolGlenageary	19840C	149	+26.3%	8	17.12	22	0
Scoil Colmcille SeniorBallybrack	19438W	147	−26.5%	7	20.14	23	0
Gaelscoil LaigheanBaile Átha Cliath 14	20518E	130	–	5	26.00	33	1
Scoil Cholmcille Junior NSBallybrack	19641T	124	−9.5%	7	17.71	27	0
Gaelscoil PhadraigBaile Breac	20056P	118	−27.6%	5	22.80	25	0
St Columbanus National SchoolDun Laoghaire	20218P	113	+6.6%	6	15.83	19	0
Harold Boys N SDalkey	15132B	106	−12.4%	5	21.20	25	0
Dalkey N S (2)Dalkey	14647G	101	+1.0%	4	25.25	27	0
St Brigids N SStillorgan	16794G	100	+1.0%	4	25.00	27	0
Booterstown N SBlackrock	19901T	85	−18.3%	4	21.25	26	0
All Saints N SBlackrock	10494K	51	−19.0%	3	17.00	20	0
Sallynoggin Educate Together National SchoolSallynoggin	20543D	45	–	2	19.50	23	0