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Local authority in Dublin

South Dublin County Council

Schools in County Dublin in this local authority.

Other local authorities in Dublin Dublin City Council · 192 Fingal County Council · 99 Dun Laoghaire Rathdown · 68
Schools
100
of 459 in Dublin
Pupils
33,412
25% of Dublin's pupils
Average school size
334.1
Dublin: 289.6
Average class size
22.44
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

91 schools with figures for both years

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

47fell by 10% or more
34within 10%
10grew by 10% or more
Down 25% or more · 13Down 10 to 25% · 34Within 10% · 34Up 10 to 25% · 5Up 25% or more · 5

Grown most

Pupils in 2015/16 and 2025/26

  1. 1 Tallaght Community National SchoolDublin 24, Co. Dublin 96 → 151 +57.3%
  2. 2 St Kilians Senior N SDublin 24, Co. Dublin 209 → 296 +41.6%
  3. 3 St Dominic's National SchoolDublin 24, Co. Dublin 292 → 410 +40.4%
  4. 4 Caisleain Nua LiamhnaNewcastle, Co. Dublin 481 → 626 +30.1%
  5. 5 Gaelscoil Chluain DolcainBaile Átha Cliath 22, Co. Dublin 351 → 445 +26.8%

Fallen most

Pupils in 2015/16 and 2025/26

  1. 1 Divine Mercy Junior National SchoolLucan, Co. Dublin 523 → 204 −61.0%
  2. 2 S N BriotasBrittas, Co. Dublin 134 → 57 −57.5%
  3. 3 Divine Mercy Senior National SchoolLucan, Co. Dublin 516 → 274 −46.9%
  4. 4 An Chroi Ro Naofa SoisDublin 24, Co. Dublin 284 → 167 −41.2%
  5. 5 Glen na Smol N SDublin 24, Co. Dublin 90 → 56 −37.8%

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 2,767 pupils between them. They aren’t in the figures above.

Class sizes

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

Average class size
22.44
Mainstream classes
1,455
Classes of 30 or more
47
Schools with a class of 30+
24

Teachers

Teachers in the 100 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
1,455
Up 388 since 2006/07, while pupils rose 23%
Teaching posts in 2025/26
about 2,326
Estimate: 1,455 class teachers, 102 principals and deputies, 631 special education and 138 special class teachers
Teachers in 2015/16
2,044
The Department's last count of every teacher
Since 2024/25
7 / 16
7 schools gained a class teacher, 16 lost one

Class teachers since 2006/07

One for each mainstream class, every school year

Schools

100 schools, largest first.

Change over

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Roll number
St Colmcille Senior N SDublin 16 19742C 744
+4.9%
29 25.66 27 0
Scoil Colmcille NaofaDublin 16 19474D 721
−11.5%
29 24.66 26 0
Holy Family National SchoolRathcoole 13217W 671
+6.8%
24 27.96 31 7
S N Naomh MhuireSaggart 17055T 666
+7.2%
24 26.75 30 1
Caisleain Nua LiamhnaNewcastle 16461C 626
+30.1%
24 25.58 30 2
Scoil Aine NaofaLucan 19676P 614
+18.5%
23 26.39 29 0
St Thomas Junior National SchoolLucan 19542R 573
+3.1%
22 25.77 30 1
Scoil MhuireLucan 13447Q 558
−18.4%
23 23.74 30 2
St Pius X G N SDublin 6W 19178W 540
+3.1%
20 27.00 31 2
Holy Rosary Primary SchoolDublin 24 19878E 525
−12.4%
24 21.88 25 0
St Pius X N S BoysDublin 6 19177U 511
−3.4%
20 25.55 29 0
Lucan B N SLucan 00714P 501
−0.8%
21 23.57 30 1
St Marks Sen NSDublin 24 19390U 497
−3.5%
21 23.14 27 0
St Marys N SLucan 19817H 483
+14.2%
19 24.84 28 0
St Patrick GNSDublin 16 19114T 472
−8.5%
20 23.35 30 1
Our Lady Queen of ApostlesDublin 22 19566I 469
−15.9%
19 24.68 33 7
Griffeen Valley Educate Together NSLucan 20166W 466
−4.3%
20 22.75 27 0
Sacred Heart N SDublin 22 19799I 463
−1.7%
18 24.72 29 0
Bishop Galvin NSDublin 6w 19494J 461
−2.9%
18 25.28 30 2
Marley Grange NSDublin 16 19574H 461
−7.6%
19 24.26 30 1
St Marks Junior MixedDublin 24 19472W 449
−22.0%
20 21.75 23 0
Clochar Loreto N SDublin 14 00729F 445
−13.6%
19 22.95 29 0
Gaelscoil Chluain DolcainBaile Átha Cliath 22 19855P 445
+26.8%
17 26.18 30 1
Bishop Shanahan NSDublin 6W 19658N 437
−8.0%
18 24.17 29 0
Adamstown Castle Educate Together National SchoolAdamstown 20268H 431
+8.0%
16 26.19 28 0
St. John the Evangelist National SchoolAdamstown Castle 20194E 417
+16.5%
16 25.88 29 0
Lucan East ETNSLucan 20303G 416
−10.2%
16 25.25 28 0
Citywest & Saggart Community National SchoolDublin 24 20398U 413
+90.3%
16 25.06 27 0
St Dominic's National SchoolDublin 24 20468P 410
+40.4%
22 18.09 20 0
St Ronans N SDublin 22 19707A 396
−8.8%
19 20.84 26 0
Scoil Maelruain SeniorTest Address 19463V 386
+1.3%
16 24.12 27 0
Lucan Educate Together NSLucan 20066S 384
−13.1%
16 23.25 25 0
St Martin de Porres N SDublin 24 19617W 383
−12.6%
16 23.19 27 0
Esker Educate Together NSLucan 20274C 382
−11.2%
16 23.62 27 0
Scoil Treasa FirhouseDublin 24 19565G 377
−3.6%
16 23.31 26 0
City West Educate Together National SchoolDublin 24 20402I 376
+83.4%
16 22.75 24 0
Gaelscoil Eiscir RiadaLeamhcán 20223I 376
−22.0%
16 23.19 28 0
Ballyroan B N SDublin 16 03359N 375
+5.3%
16 23.44 31 2
Lucan Community National SchoolLucan 20426W 375
+443.5%
16 22.75 25 0
St Andrews N SLucan 12014D 374
+9.0%
16 22.62 30 2
Belgard Heights N SDublin 24 19541P 372
−2.1%
16 22.12 26 0
Scoil Maelruain JuniorDublin 24 19462T 369
−21.2%
16 22.69 25 0
Gaelscoil Naomh PadraigLeamhcán 19940G 367
−23.1%
16 22.56 25 0
Scoil Mhuire BoysDublin 14 19446V 367
−19.9%
16 22.94 28 0
Scoil Naomh SeosamhDublin 22 18655C 360
−12.8%
15 23.60 29 0
Firhouse Educate Together National SchoolDublin 24 20411J 355
+446.2%
16 21.44 26 0
Scoil ChronainRáth Cúil 19503H 354
+9.9%
16 21.75 27 0
St Marys SchoolDublin 24 18411U 349
−9.1%
14 24.93 27 0
Scoil Aoife CNSDublin 24 20422O 342
+1,800.0%
16 20.62 24 0
Shellybanks Educate Together National SchoolDublin 4 20441S 333
+274.2%
14 22.93 32 1
St Thomas Senior N SDublin 24 19765O 331
−25.1%
17 18.35 21 0
Scoil Bride CDublin 20 18324C 329
−8.6%
14 23.07 34 2
Scoil Lorcain BDublin 20 18323A 321
−18.5%
14 22.50 29 0
Scoil CarmelDublin 24 17899C 313
−30.1%
14 21.50 26 0
St Annes Primary SchoolDublin 24 20173T 301
−30.6%
16 17.69 21 0
St Thomas Junior N SDublin 24 19702N 300
−27.5%
21 14.29 17 0
St Kilians Senior N SDublin 24 19893A 296
+41.6%
12 24.17 29 0
Scoil MhuireDublin 22 18602E 292
−18.7%
12 23.83 27 0
Talbot Senior NSDublin 22 19510E 286
−11.5%
14 20.00 23 0
Scoil Chaitlin MaudeBaile Átha Cliath 24 19872P 284
−9.3%
16 17.12 21 0
St Kilians Junior SchoolDublin 24 19556F 281
+1.8%
12 22.92 27 0
Gaelscoil na GiúiseD24 W682 20412L 278
+434.6%
12 22.17 34 2
St Peter Apostle Sen NSDublin 22 19642V 278
+8.2%
13 20.46 24 0
St Kevins BoysDublin 24 19465C 275
−16.4%
11 23.36 26 0
Divine Mercy Senior National SchoolLucan 20187H 274
−46.9%
13 20.92 24 0
Holy Spirit Junior Primary SchoolDublin 12 20463F 270
−14.8%
16 16.50 20 0
Scoil SantainBaile Átha Cliath 24 19646G 262
−27.4%
13 19.69 27 0
Scoil Nano NagleDublin 22 19509T 261
−11.2%
15 16.33 19 0
St Kevins GirlsDublin 24 19466E 257
−12.9%
10 24.10 32 2
Scoil Naomh IdeDublin 22 19220S 252
−17.6%
10 24.60 33 2
St Aidans NSDublin 24 19834H 244
−22.8%
12 19.83 24 0
Riverview Educate Together National SchoolDublin 12 20494Q 242 – 9 25.67 32 2
Gaelscoil Chnoc LiamhnaBaile Átha Cliath 16 20043G 233
−1.3%
9 25.89 29 0
Neillstown N SDublin 22 19569O 231
−24.3%
13 16.38 18 0
St Damiens NSDublin 12 19943M 231
−2.5%
9 25.00 33 1
Scoil Naomh AineDublin 22 19221U 222
−23.7%
9 23.33 28 0
Gaelscoil na CamoigeBaile Átha Cliath 22 19991A 215
−8.1%
9 23.89 30 1
Rathfarnham Parish N SDublin 14 14939T 215
−7.3%
8 26.88 30 1
S N an Croi Ro NaofaDublin 24 19543T 213
−26.3%
10 21.00 25 0
S N AenghusaDublin 24 19576L 209
+10.6%
11 19.00 28 0
St Brigids N SDublin 24 19782O 206
−28.0%
12 16.67 20 0
Divine Mercy Junior National SchoolLucan 19865S 204
−61.0%
12 16.50 21 0
St Marys Sen N SDublin 22 19647I 204
−11.3%
9 20.44 30 1
St Bernadettes Senior N SDublin 22 19785U 194
−13.0%
9 20.22 23 0
Whitechurch Nat SchoolDublin 16 11638N 194
+6.0%
8 23.50 25 0
Scoil MhuireDublin 16 19490B 187
−22.1%
11 15.36 23 0
St Marys Junior N SDublin 22 19575J 183
−19.4%
11 15.55 20 0
St Bernadettes Junior N SDublin 22 19743E 173
−19.9%
10 16.10 22 0
An Chroi Ro Naofa SoisDublin 24 19652B 167
−41.2%
10 15.50 19 0
Scoil Aenghusa Jun NSDublin 24 19502F 159
−37.6%
9 17.67 20 0
Tallaght Community National SchoolDublin 24 19582G 151
+57.3%
7 19.86 26 0
Scoil Cnoc Mhuire SinDublin 24 19613O 145
−1.4%
7 19.00 25 0
Scoil Cnoc Mhuire JuniorDublin 24 19775R 141
−23.4%
10 12.90 17 0
Scoil IosaDublin 24 19577N 109
+14.7%
5 19.40 27 0
S N Naomh EoinDublin 22 18642Q 91
−11.7%
4 22.75 26 0
S N Bhaile EamonnDublin 16 17953F 75
−16.7%
4 18.75 23 0
S N BriotasBrittas 18173H 57
−57.5%
4 14.25 17 0
Glen na Smol N SDublin 24 17996A 56
−37.8%
3 18.67 25 0
Gaelscoil LirDublin 24 20531T 53 – 3 14.67 15 0
S N Naomh CillinDublin 12 16983J 30
−6.2%
2 15.00 17 0