| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| ST PATRICKS N SCHOOL | 11525A | Dublin | 449 | 23.83 | 30 | 2 |
| Grace Park Educate Together National School | 20486R | Dublin | 409 | 24.81 | 28 | 0 |
| CORPUS CHRISTI N S | 16860Q | Dublin | 398 | 24.38 | 30 | 1 |
| ST COLUMBAS CON G & I | 16659A | Dublin | 378 | 23.62 | 29 | 0 |
| GARDINER STREET CONVENT | 12448N | Dublin | 298 | 16.56 | 22 | 0 |
| SCOIL MOBHI | 19395H | Dublin | 248 | 31.00 | 34 | 7 |
| St Mary's Primary School | 20436C | Dublin | 239 | 19.42 | 21 | 0 |
| CENTRAL SENIOR MXD N S | 00752A | Dublin | 227 | 17.46 | 26 | 0 |
| ST MARYS N S | 19981U | Dublin | 212 | 18.73 | 24 | 0 |
| ST JOSEPHS MXD N S | 19774P | Dublin | 211 | 19.18 | 24 | 0 |
| S N SAN VINSEANN CAILIN | 15056L | Dublin | 208 | 16.83 | 22 | 0 |
| Drumcondra Marino Dublin 1 gaelscoil | 20517C | Dublin | 176 | 25.14 | 30 | 2 |
| PRESENTATION PRIMARY SCHOOL | 05933G | Dublin | 165 | 18.38 | 22 | 0 |
| GAELSCOIL CHOLAISTE MHUIRE | 19926M | Dublin | 161 | 20.12 | 25 | 0 |
| St Laurence O'Toole's National School | 20507W | Dublin | 159 | 13.91 | 18 | 0 |
| SCOIL UI CHONAILL BOYS SENIORS | 17881G | Dublin | 155 | 14.40 | 17 | 0 |
| RUTLAND NATIONAL SCHOOL | 19946S | Dublin | 152 | 19.00 | 20 | 0 |
| CENTRAL INFS SCHOOL | 01795A | Dublin | 149 | 16.56 | 20 | 0 |
| S N Seosamh na mBrathar | 18726W | Dublin | 116 | 19.60 | 22 | 0 |
| LINDSAY ROAD N S | 16177F | Dublin | 95 | 23.75 | 26 | 0 |
| ST COLUMBAS N S MXD | 14463T | Dublin | 90 | 22.50 | 26 | 0 |
| ST VINCENTS INF BOYS | 15816I | Dublin | 88 | 12.57 | 14 | 0 |
| DRUMCONDRA N S | 15895H | Dublin | 81 | 20.25 | 27 | 0 |
| NAOMH LORCAN O TUATHAIL SENIOR BOYS | 17110B | Dublin | 69 | 14.25 | 19 | 0 |
| SCOIL CHAOIMHIN | 19831B | Dublin | 68 | 17.00 | 19 | 0 |