| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| Dublin 7 Educate Together NS | 20131D | Dublin | 515 | 23.95 | 30 | 3 |
| Glasnevin Educate Together NS | 20168D | Dublin | 410 | 24.88 | 27 | 0 |
| ST PETERS NS | 20091R | Dublin | 409 | 22.72 | 28 | 0 |
| ST BRIGIDS CONVENT | 16577V | Dublin | 406 | 25.38 | 30 | 2 |
| NORTH DUBLIN MUSLIM NS | 20152L | Dublin | 391 | 24.06 | 27 | 0 |
| Broombridge Educate Together National School | 20453C | Dublin | 387 | 23.44 | 31 | 1 |
| Pelletstown ETNS | 20392I | Dublin | 386 | 23.38 | 27 | 0 |
| STANHOPE STREET PRIMARY SCHOOL | 09932B | Dublin | 384 | 18.65 | 21 | 0 |
| Mary, Help of Christians G.N.S. | 17367P | Dublin | 352 | 23.47 | 28 | 0 |
| S N EOIN BOSCO BUACH | 17912O | Dublin | 290 | 21.23 | 29 | 0 |
| St. Vincent's Primary School | 17214N | Dublin | 240 | 24.00 | 29 | 0 |
| GAELSCOIL BHARRA | 20047O | Dublin | 212 | 19.27 | 29 | 0 |
| ST GABRIELS N S | 20035H | Dublin | 168 | 17.22 | 20 | 0 |
| DOMINICAN CONVENT GIRLS SENIOR SCHOOL | 17465P | Dublin | 148 | 17.75 | 27 | 0 |
| S N EOIN BOSCO NAI BUAC | 18632N | Dublin | 146 | 22.33 | 24 | 0 |
| ST CATHERINES INFANT SCHOOL | 17466R | Dublin | 139 | 14.11 | 16 | 0 |
| Fionnbarra Naofa B.N.S. | 17464N | Dublin | 126 | 16.29 | 23 | 0 |
| SCOIL NA MBRATHAR BOYS SENIOR SCHOOL | 16695E | Dublin | 120 | 15.43 | 21 | 0 |
| CHRIST THE KING B N S | 16988T | Dublin | 86 | 12.33 | 19 | 0 |
| GLASNEVIN N S | 14980Q | Dublin | 83 | 20.75 | 24 | 0 |
| CHRIST THE KING GIRLS SENIOR SCHOOL | 16989V | Dublin | 74 | 14.80 | 18 | 0 |
| CHRIST THE KING I G | 17459U | Dublin | 37 | 12.33 | 18 | 0 |