| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| Scoil Íosa | 20584R | Galway | 770 | 25.59 | 31 | 3 |
| 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 |
| Gaelscoil de hIde | 19998O | Galway | 399 | 24.94 | 28 | 0 |
| SCOIL MHUIRE | 19529C | Galway | 396 | 24.75 | 30 | 1 |
| Merlin Woods Primary School | 20350P | Galway | 383 | 23.19 | 26 | 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 NAOMH IOSEF | 15523Q | Galway | 324 | 22.50 | 29 | 0 |
| S N CREACHMHAOIL | 05754G | Galway | 318 | 23.54 | 27 | 0 |
| S N Chlair na Gaillimhe | 16804G | Galway | 311 | 23.92 | 29 | 0 |
| Scoil Náisiúnta Róis | 19241D | Galway | 297 | 21.92 | 28 | 0 |
| Scoil Chuimín & Caitríona | 20199O | Galway | 265 | 23.00 | 32 | 2 |
| NIOCHLAS N S | 16943U | Galway | 262 | 17.00 | 22 | 0 |
| AINBHTHIN NAOFA | 14590D | Galway | 261 | 24.90 | 33 | 2 |
| SCOIL MHUIRE | 19965W | Galway | 256 | 23.27 | 33 | 3 |
| SCOIL IDE | 18634R | Galway | 244 | 22.18 | 32 | 2 |
| SCOIL AN LINBH IOSA | 04515G | Galway | 236 | 17.77 | 27 | 0 |
| SCOIL NAOMH MHUIRE | 18089S | Galway | 233 | 25.89 | 31 | 4 |
| 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 |
| S N PADRAIC NAOFA | 17784I | Galway | 214 | 22.44 | 34 | 1 |
| Gort National School | 20465J | Galway | 197 | 21.89 | 30 | 2 |
| S N CILLININ | 18268S | Galway | 195 | 24.38 | 31 | 1 |
| S N BRIDE NAOFA | 17782E | Galway | 187 | 18.00 | 25 | 0 |
| SCOIL NAOMH IOSEF | 13914V | Galway | 183 | 21.00 | 28 | 0 |
| BALLINDERREEN MXD N S | 07551C | Galway | 182 | 24.29 | 29 | 0 |
| S N ARD RAITHIN | 17007I | Galway | 176 | 25.14 | 31 | 2 |
| SN CEARN MOR | 19828M | Galway | 174 | 24.86 | 31 | 2 |
| SCOIL EINNE | 20115F | Galway | 171 | 24.43 | 30 | 1 |
| S N BRIGHDE | 17759J | Galway | 130 | 19.67 | 26 | 0 |
| SCOIL CROI IOSA | 01013N | Galway | 122 | 17.43 | 20 | 0 |
| SCOIL NAOMH EINDE | 18929N | Galway | 119 | 21.40 | 27 | 0 |
| S N CILL TARTAIN | 17789S | Galway | 117 | 23.40 | 31 | 1 |
| KILCHREEST CENTRAL SCH | 19544V | Galway | 110 | 27.50 | 33 | 2 |
| NAOMH COLMAN MAC DUAIGH | 19377F | Galway | 109 | 27.25 | 30 | 1 |
| BALLYMANA N S | 10675O | Galway | 108 | 21.60 | 28 | 0 |
| S N AINE NAOFA | 17475S | Galway | 92 | 21.50 | 30 | 1 |
| LURGA N S | 12574S | Galway | 91 | 22.75 | 29 | 0 |
| SN Tuairini | 13415D | Galway | 84 | 21.00 | 25 | 0 |
| SN COLMCILLE | 17221K | Galway | 70 | 16.00 | 18 | 0 |
| S N CILL FHEICIN | 14394D | Galway | 69 | 23.00 | 28 | 0 |
| S N CIARAIN NAOFA | 17869Q | Galway | 67 | 21.00 | 22 | 0 |
| SN Tullach Ui Chadhain | 08446K | Galway | 65 | 21.67 | 29 | 0 |
| S N BRIGHDHE NAOFA | 17772B | Galway | 64 | 21.33 | 33 | 1 |
| S N BAILE NUA | 15331H | Galway | 62 | 20.67 | 23 | 0 |
| S N COILM CILLE | 12946G | Galway | 59 | 18.00 | 23 | 0 |
| S N CRONAIN | 17645R | Galway | 59 | 19.67 | 28 | 0 |
| S N MHUIRE | 14642T | Galway | 58 | 19.33 | 25 | 0 |
| S N NAOMH THOMAIS | 17502S | Galway | 55 | 18.33 | 21 | 0 |
| St Columba's National School | 20491K | Galway | 44 | 22.00 | 23 | 0 |
| S N MHUIRE | 11373D | Galway | 31 | 15.50 | 18 | 0 |
| S N BRIOCAIN | 17463L | Galway | 19 | 9.50 | 12 | 0 |
| S N MUIRE GAN SMAL | 11290W | Galway | 19 | 9.50 | 10 | 0 |
| S N Caladh na Muc | 17655U | Galway | 18 | 9.00 | 10 | 0 |
| S N COLMCILLE | 13699U | Galway | 17 | 8.50 | 9 | 0 |
| SCOIL MHUIRE | 18252D | Galway | 16 | 8.00 | 9 | 0 |