| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| SCOIL BHRIDE NS | 19747M | Laois | 727 | 19.86 | 23 | 0 |
| Holy Family Senior School | 20480F | Laois | 644 | 23.41 | 26 | 0 |
| Holy Family Junior School | 20270R | Laois | 599 | 23.40 | 26 | 0 |
| SCOIL PHADRAIG | 17827A | Laois | 521 | 21.87 | 26 | 0 |
| PRESENTATION PRIMARY SCHOOL | 15556I | Laois | 496 | 22.48 | 29 | 0 |
| SCOIL CHOMHGAIN NAOFA | 17617M | Laois | 380 | 23.12 | 27 | 0 |
| S N NAOMH EOIN | 18641O | Laois | 374 | 23.38 | 28 | 0 |
| St Coleman's National School | 20353V | Laois | 318 | 23.54 | 30 | 1 |
| SCOIL MHUIRE | 19750B | Laois | 269 | 22.27 | 31 | 1 |
| ST JOSEPHS GIRLS N.S. | 07183W | Laois | 230 | 19.17 | 26 | 0 |
| SCOIL PADRAIG | 17064U | Laois | 218 | 23.56 | 30 | 1 |
| FRAOCH MOR N S | 18150S | Laois | 212 | 26.50 | 31 | 1 |
| RAITHIN AN UISCE N S | 17604D | Laois | 211 | 25.62 | 31 | 1 |
| S N BAILE FINN | 15537E | Laois | 208 | 22.44 | 27 | 0 |
| EMO MIXED N S | 13643Q | Laois | 207 | 24.38 | 27 | 0 |
| NA CARRAIGE N S | 18206T | Laois | 204 | 24.75 | 28 | 0 |
| RATH MIXED N S | 13741Q | Laois | 194 | 22.75 | 24 | 0 |
| MHUIRE FATIMA N S | 18368W | Laois | 193 | 22.62 | 26 | 0 |
| MOUNTMELLICK BOYS N S | 16070K | Laois | 187 | 15.91 | 24 | 0 |
| Ballyroan Primary School | 20485P | Laois | 177 | 24.43 | 29 | 0 |
| TOBAR AN LEINN | 16667W | Laois | 167 | 25.83 | 32 | 3 |
| SCOIL BHRIDE | 20118L | Laois | 127 | 21.17 | 27 | 0 |
| BALLYADAMS N S | 16617H | Laois | 111 | 24.75 | 26 | 0 |
| ST FINTANS N S | 07636K | Laois | 108 | 19.20 | 22 | 0 |
| SCOIL ABBAIN CILLIN | 17557U | Laois | 99 | 19.80 | 31 | 1 |
| BALLINAKILL MIXED N S | 00895W | Laois | 98 | 24.50 | 29 | 0 |
| SCOIL BHRIDE | 13343E | Laois | 95 | 19.00 | 23 | 0 |
| Barr na Sruthan N S | 18294T | Laois | 91 | 19.75 | 24 | 0 |
| NAOMH PADRAIG N S | 18513F | Laois | 86 | 20.00 | 22 | 0 |
| ROSENALLIS N S | 17493U | Laois | 75 | 15.75 | 23 | 0 |
| SCOIL NAOMH ABBAN | 17555Q | Laois | 73 | 22.33 | 23 | 0 |
| S N FIONNTAN NAOFA | 17489G | Laois | 60 | 18.00 | 26 | 0 |
| S N MOLAISE | 17695J | Laois | 58 | 19.33 | 23 | 0 |
| Scoil Mhuire Naofa Castlecuffe | 17883K | Laois | 53 | 15.67 | 18 | 0 |
| ARDLIOS N S | 18532J | Laois | 50 | 14.67 | 21 | 0 |
| TRUMMERA N S | 15446B | Laois | 34 | 17.00 | 19 | 0 |
| Scoil an Chroi Ro Naofa | 18014K | Laois | 29 | 14.50 | 17 | 0 |
| SCOIL MHUIRE MUIGHEO | 17271C | Laois | 22 | 11.00 | 13 | 0 |
| BHRIDE N S | 18265M | Laois | 13 | 6.50 | 8 | 0 |
| SCOIL MHUIRE | 17441B | Laois | 9 | 4.50 | 5 | 0 |