| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| GAELSCOIL MHIC AMHLAIGH | 19994G | Galway | 643 | 23.81 | 31 | 2 |
| S N IOGNAID | 19371Q | Galway | 480 | 24.00 | 31 | 2 |
| GAELSCOIL DARA | 19858V | Galway | 419 | 24.65 | 29 | 0 |
| St. John the Apostle, Knocknacarra NS | 20108I | Galway | 400 | 24.62 | 28 | 0 |
| Merlin Woods Primary School | 20350P | Galway | 383 | 23.19 | 26 | 0 |
| Galway Educate Together NS | 20000L | Galway | 373 | 22.19 | 27 | 0 |
| BUSHY PARK N S | 13856K | Galway | 366 | 22.88 | 25 | 0 |
| SN CAITRIONA SINSEAR | 19468I | Galway | 365 | 23.27 | 26 | 0 |
| Radharc na Mara National School | 20554I | Galway | 353 | 15.67 | 22 | 0 |
| S N CAITRIONA SOIS | 19401W | Galway | 350 | 17.16 | 21 | 0 |
| TIRELLAN HEIGHTS N S | 19795A | Galway | 330 | 15.71 | 20 | 0 |
| S N Chlair na Gaillimhe | 16804G | Galway | 311 | 23.92 | 29 | 0 |
| Scoil Náisiúnta Róis | 19241D | Galway | 297 | 21.92 | 28 | 0 |
| Scoil Bhrige agus Bhreandain Naofa | 19997M | Galway | 281 | 23.42 | 31 | 2 |
| NIOCHLAS N S | 16943U | Galway | 262 | 17.00 | 22 | 0 |
| SCOIL IDE | 18634R | Galway | 244 | 22.18 | 32 | 2 |
| SCOIL AN LINBH IOSA | 04515G | Galway | 236 | 17.77 | 27 | 0 |
| S N na bhForbacha | 17668G | Galway | 229 | 28.62 | 32 | 4 |
| SCOIL MHUIRE | 17845C | Galway | 223 | 21.10 | 30 | 3 |
| S N Seamus Naofa | 19803T | Galway | 221 | 22.10 | 32 | 2 |
| Claregalway Educate Together NS | 20211B | Galway | 220 | 23.11 | 28 | 0 |
| S N FHURSA | 16937C | Galway | 216 | 24.00 | 30 | 2 |
| S N PADRAIC NAOFA | 17784I | Galway | 214 | 22.44 | 34 | 1 |
| Knocknacarra Educate Together NS | 20410H | Galway | 207 | 24.50 | 28 | 0 |
| S N BRIDE NAOFA | 17782E | Galway | 187 | 18.00 | 25 | 0 |
| SCOIL NAOMH IOSEF | 13914V | Galway | 183 | 21.00 | 28 | 0 |
| SN CEARN MOR | 19828M | Galway | 174 | 24.86 | 31 | 2 |
| S N BRIGHDE | 17759J | Galway | 130 | 19.67 | 26 | 0 |
| SN N BREANDAIN | 18163E | Galway | 129 | 21.50 | 25 | 0 |
| SCOIL CROI IOSA | 01013N | Galway | 122 | 17.43 | 20 | 0 |
| SCOIL NAOMH EINDE | 18929N | Galway | 119 | 21.40 | 27 | 0 |
| Cuan na Gaillimhe Community National School | 20462D | Galway | 112 | 22.40 | 29 | 0 |
| S N AN BHAIN MHOIR | 09069L | Galway | 108 | 19.20 | 24 | 0 |
| PAROCHIAL N S | 16750J | Galway | 75 | 18.75 | 26 | 0 |
| SN COLMCILLE | 17221K | Galway | 70 | 16.00 | 18 | 0 |