| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| TANEY N S | 15284B | Dublin | 384 | 24.00 | 28 | 0 |
| ST ANDREWS N S | 12014D | Dublin | 374 | 22.62 | 30 | 2 |
| ST GEORGES N S | 15315J | Dublin | 339 | 24.69 | 28 | 0 |
| S N na Lanai Glasa | 17730I | Dublin | 285 | 25.91 | 31 | 3 |
| RATHFARNHAM PARISH N S | 14939T | Dublin | 215 | 26.88 | 30 | 1 |
| SN PAROISTE MAITIU NFA | 18282M | Dublin | 212 | 26.50 | 32 | 1 |
| S N Gleann na gCaorach Iníon Léinín | 19400U | Dublin | 211 | 23.44 | 27 | 0 |
| KILL-O'-THE-GRANGE NS | 18886V | Dublin | 208 | 25.25 | 28 | 0 |
| ST ANDREWS N S | 11583O | Dublin | 207 | 25.88 | 28 | 0 |
| KILTERNAN CHURCH OF IRELAND NS | 16629O | Dublin | 206 | 24.25 | 28 | 0 |
| RATHMICHAEL N S | 11873A | Dublin | 205 | 25.62 | 29 | 0 |
| SCOIL NAISUNTA CHNUACHA | 18623M | Dublin | 198 | 24.75 | 29 | 0 |
| SPRINGDALE N S | 18646B | Dublin | 198 | 24.75 | 28 | 0 |
| SANDFORD PARISH NATIONAL SCHOOL | 15618E | Dublin | 196 | 24.50 | 30 | 2 |
| BURROW N S | 09642P | Dublin | 195 | 24.38 | 29 | 0 |
| WHITECHURCH NAT SCHOOL | 11638N | Dublin | 194 | 23.50 | 25 | 0 |
| ST CATHERINES WEST N S | 15625B | Dublin | 193 | 24.12 | 28 | 0 |
| DALKEY N S (2) | 14647G | Dublin | 101 | 25.25 | 27 | 0 |
| ST BRIGIDS N S | 16794G | Dublin | 100 | 25.00 | 27 | 0 |
| S N AN PHAROISTE | 18205R | Dublin | 94 | 16.40 | 21 | 0 |
| S N NAOMH EOIN | 18642Q | Dublin | 91 | 22.75 | 26 | 0 |
| ZION PARISH PRIMARY SCHOOL | 14917J | Dublin | 91 | 18.20 | 25 | 0 |
| ST COLUMBAS N S MXD | 14463T | Dublin | 90 | 22.50 | 26 | 0 |
| BOOTERSTOWN N S | 19901T | Dublin | 85 | 21.25 | 26 | 0 |
| SWORDS BOROUGH N S | 12358M | Dublin | 84 | 21.00 | 26 | 0 |
| GLASNEVIN N S | 14980Q | Dublin | 83 | 20.75 | 24 | 0 |
| DRUMCONDRA N S | 15895H | Dublin | 81 | 20.25 | 27 | 0 |
| ALL SAINTS N S | 10494K | Dublin | 51 | 17.00 | 20 | 0 |
| HOLMPATRICK N S | 14180H | Dublin | 51 | 17.00 | 20 | 0 |
| CHAPELIZOD N S | 10653E | Dublin | 30 | 15.00 | 15 | 0 |