| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| SCOIL MHUIRE AGUS IOSAF | 20122C | Sligo | 241 | 23.50 | 29 | 0 |
| S N EOIN NAOFA | 17838F | Sligo | 226 | 25.11 | 31 | 2 |
| SCOIL MHUIRE GAN SMAL | 19964U | Sligo | 215 | 23.89 | 32 | 1 |
| HOLY FAMILY SCHOOL | 20019J | Sligo | 192 | 24.00 | 30 | 1 |
| ROCKFIELD N S | 15378K | Sligo | 174 | 24.86 | 33 | 1 |
| CARN N S | 12537M | Sligo | 116 | 23.20 | 26 | 0 |
| CLOONACOOL N S | 04802J | Sligo | 103 | 25.75 | 31 | 1 |
| S N MUIRE GAN SMAL | 18029A | Sligo | 103 | 20.60 | 27 | 0 |
| MOYLOUGH N S | 13831R | Sligo | 100 | 25.00 | 30 | 1 |
| SCOIL CROI NAOFA | 20113B | Sligo | 81 | 20.25 | 26 | 0 |
| SCOIL NAOMH AODAIN | 19392B | Sligo | 79 | 19.75 | 25 | 0 |
| S N NAITHI NAOFA | 04487E | Sligo | 77 | 19.25 | 28 | 0 |
| SN MUIRE GAN SMAL | 19389M | Sligo | 76 | 19.00 | 23 | 0 |
| S N CUL FADA | 18298E | Sligo | 73 | 18.25 | 23 | 0 |
| S N LISSARA NAOFA | 17774F | Sligo | 66 | 22.00 | 26 | 0 |
| S N CNOC MIONNA | 18334F | Sligo | 52 | 17.33 | 20 | 0 |
| S N NAOMH MHUIRE | 15342M | Sligo | 47 | 15.67 | 18 | 0 |
| Our Lady's National School | 20385L | Sligo | 40 | 7.33 | 10 | 0 |
| S N RONAIN NAOFA | 12767G | Sligo | 37 | 18.50 | 22 | 0 |
| CASTLEROCK N S | 13242V | Sligo | 31 | 15.50 | 19 | 0 |
| KILLAVILLE N S | 15431L | Sligo | 19 | 9.50 | 11 | 0 |