| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| SCOIL AINE NAOFA | 19676P | Dublin | 614 | 26.39 | 29 | 0 |
| ST THOMAS JUNIOR NATIONAL SCHOOL | 19542R | Dublin | 573 | 25.77 | 30 | 1 |
| SCOIL MHUIRE | 13447Q | Dublin | 558 | 23.74 | 30 | 2 |
| LUCAN B N S | 00714P | Dublin | 501 | 23.57 | 30 | 1 |
| ST MARYS N S | 19817H | Dublin | 483 | 24.84 | 28 | 0 |
| Griffeen Valley Educate Together NS | 20166W | Dublin | 466 | 22.75 | 27 | 0 |
| Adamstown Castle Educate Together National School | 20268H | Dublin | 431 | 26.19 | 28 | 0 |
| St. John the Evangelist National School | 20194E | Dublin | 417 | 25.88 | 29 | 0 |
| Lucan East ETNS | 20303G | Dublin | 416 | 25.25 | 28 | 0 |
| Lucan Educate Together NS | 20066S | Dublin | 384 | 23.25 | 25 | 0 |
| Esker Educate Together NS | 20274C | Dublin | 382 | 23.62 | 27 | 0 |
| GAELSCOIL EISCIR RIADA | 20223I | Dublin | 376 | 23.19 | 28 | 0 |
| Lucan Community National School | 20426W | Dublin | 375 | 22.75 | 25 | 0 |
| ST ANDREWS N S | 12014D | Dublin | 374 | 22.62 | 30 | 2 |
| GAELSCOIL NAOMH PADRAIG | 19940G | Dublin | 367 | 22.56 | 25 | 0 |
| DIVINE MERCY SENIOR NATIONAL SCHOOL | 20187H | Dublin | 274 | 20.92 | 24 | 0 |
| DIVINE MERCY JUNIOR NATIONAL SCHOOL | 19865S | Dublin | 204 | 16.50 | 21 | 0 |