| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| Trinity Primary School | 20547L | Galway | 781 | 19.97 | 25 | 0 |
| Athenry Primary School | 20582N | Galway | 501 | 23.57 | 29 | 0 |
| Scoil Bhrige agus Bhreandain Naofa | 19997M | Galway | 281 | 23.42 | 31 | 2 |
| SN MUINE MHEA | 18746F | Galway | 251 | 24.60 | 35 | 1 |
| SCOIL MHUIRE | 19973V | Galway | 241 | 23.30 | 33 | 1 |
| S N BHRIDE | 12954F | Galway | 229 | 25.44 | 33 | 2 |
| S N MHUIRE | 17771W | Galway | 229 | 25.44 | 30 | 1 |
| NIOCLAS NAOFA | 19744G | Galway | 221 | 24.56 | 32 | 1 |
| S N NAOMH PADRAIG | 16936A | Galway | 221 | 22.10 | 31 | 2 |
| SN SAILEARNA | 12706J | Galway | 212 | 23.22 | 30 | 2 |
| BUNSCOIL NAOMH CHUANA | 12782C | Galway | 208 | 24.50 | 32 | 3 |
| S N an Croi Ro Naofa | 18021H | Galway | 208 | 24.62 | 29 | 0 |
| Ceathru na nGarrdhanta | 17631G | Galway | 203 | 25.38 | 29 | 0 |
| SN MHIC DARA | 19932H | Galway | 202 | 25.25 | 30 | 2 |
| ST COLMANS MXD N S | 19276W | Galway | 202 | 25.25 | 29 | 0 |
| ST OLIVER PLUNKETTS NS | 19449E | Galway | 199 | 24.88 | 28 | 0 |
| BALLINDERRY N S | 16410I | Galway | 191 | 23.88 | 36 | 2 |
| SCOIL NAOMH MHUIRE | 18125T | Galway | 180 | 25.71 | 31 | 1 |
| Newtown NS | 20280U | Galway | 172 | 24.57 | 31 | 1 |
| SCOIL NAOMH PADRAIG | 18332B | Galway | 146 | 24.33 | 30 | 1 |
| GLENAMADDY NS | 18572V | Galway | 142 | 21.83 | 31 | 1 |
| Headford Primary School | 20583P | Galway | 137 | 22.83 | 34 | 1 |
| SN N BREANDAIN | 18163E | Galway | 129 | 21.50 | 25 | 0 |
| S N CATHAIR GEAL | 17807R | Galway | 124 | 24.80 | 33 | 1 |
| St Oliver Plunkett National School | 19380R | Galway | 114 | 22.80 | 33 | 1 |
| CROI RONAOFA MEASCAITHE | 17368R | Galway | 110 | 22.00 | 25 | 0 |
| S N AN BHAIN MHOIR | 09069L | Galway | 108 | 19.20 | 24 | 0 |
| CLONBERNE CENTRAL SCH | 19388K | Galway | 107 | 21.40 | 27 | 0 |
| Scoil Mhuire Naofa | 17877P | Galway | 106 | 21.20 | 26 | 0 |
| Annagh Hill NS | 20448J | Galway | 105 | 21.00 | 29 | 0 |
| S N NAOMH FHURSA | 17118R | Galway | 100 | 19.00 | 27 | 0 |
| S N na Fuar Coilleadh | 17051L | Galway | 100 | 25.00 | 28 | 0 |
| SN BAILE AN MHUILINN | 18460K | Galway | 99 | 19.80 | 27 | 0 |
| CRUMLIN N S | 12606F | Galway | 95 | 23.75 | 26 | 0 |
| GARRAFRAUNS CENTRAL SCH | 19391W | Galway | 95 | 23.75 | 32 | 1 |
| S N NAOMH IOSEF | 13686L | Galway | 94 | 22.75 | 24 | 0 |
| S N DOMHNACH PADRAIG | 17207Q | Galway | 92 | 23.00 | 32 | 1 |
| KILCONLY N S | 15475I | Galway | 90 | 22.50 | 25 | 0 |
| S N AN TSAILEAIN | 06489S | Galway | 90 | 22.50 | 28 | 0 |
| CARNAIN N.S. | 14031N | Galway | 89 | 22.25 | 30 | 1 |
| S N MUIRE | 13621G | Galway | 85 | 21.25 | 26 | 0 |
| S N CHOILM CHILLE | 18514H | Galway | 83 | 19.25 | 23 | 0 |
| S N Tir an Fhiaidh | 17689O | Galway | 83 | 20.75 | 24 | 0 |
| Scoil Mhuire | 20564L | Galway | 81 | 20.25 | 24 | 0 |
| BRIERFIELD N SCHOOL | 14294W | Galway | 80 | 14.80 | 18 | 0 |
| BARNADERG CENTRAL SCH | 19275U | Galway | 77 | 19.25 | 23 | 0 |
| S N COR AN DROMA | 15796F | Galway | 73 | 22.33 | 25 | 0 |
| S N AN LEATH BHAILE | 17197Q | Galway | 69 | 23.00 | 28 | 0 |
| S N NAOMH UINSEANN | 16857E | Galway | 67 | 16.75 | 24 | 0 |
| CLOUGHANOWER N S | 14448A | Galway | 66 | 16.50 | 21 | 0 |
| SN AN FHAIRCHE | 14712O | Galway | 62 | 20.67 | 27 | 0 |
| SCOIL NAOMH PADRAIG | 14278B | Galway | 60 | 20.00 | 23 | 0 |
| S N MHUIRE | 18121L | Galway | 58 | 19.33 | 24 | 0 |
| SN Ceathru na Laithigh | 12138V | Galway | 54 | 18.00 | 25 | 0 |
| SCOIL IARLATHA NAOFA | 17863E | Galway | 53 | 17.67 | 21 | 0 |
| SCOIL NAOMH IOSEF | 18289D | Galway | 51 | 17.00 | 22 | 0 |
| SCOIL MHUIRE | 17980I | Galway | 48 | 16.00 | 18 | 0 |
| S N MUIRE GAN SMAL | 18608Q | Galway | 43 | 21.50 | 24 | 0 |
| S N LEITIRGEIS | 09833W | Galway | 39 | 19.50 | 21 | 0 |
| S N NAOMH TREASA | 17660N | Galway | 39 | 19.50 | 21 | 0 |
| ST BRENDANS N S | 20040A | Galway | 39 | 19.50 | 21 | 0 |
| S N RONAIN | 17456O | Galway | 36 | 18.00 | 18 | 0 |
| SCOIL MHUIRE | 18581W | Galway | 36 | 17.00 | 24 | 0 |
| S N CAOMHAIN | 17289V | Galway | 33 | 16.50 | 17 | 0 |
| S N BHEANAIN | 18636V | Galway | 31 | 15.50 | 17 | 0 |
| S N NAOMH PADRAIG | 14420B | Galway | 28 | 14.00 | 15 | 0 |
| SN M AN CROI GAN SMAL | 18490T | Galway | 27 | 13.50 | 14 | 0 |
| S N EANNA | 12502Q | Galway | 25 | 12.50 | 13 | 0 |
| S N Leitir Meallain | 20345W | Galway | 25 | 12.50 | 14 | 0 |
| S N NAOMH BRID | 11669B | Galway | 25 | 10.50 | 13 | 0 |
| SN AN AILL BHREACH | 17488E | Galway | 25 | 12.50 | 14 | 0 |
| S N Gort na Leime | 18686N | Galway | 23 | 9.50 | 12 | 0 |
| S N NAOMH CIARAIN | 17574U | Galway | 22 | 9.50 | 11 | 0 |
| S N Tir na Cille | 19357W | Galway | 22 | 11.00 | 15 | 0 |
| S N AN ARD MHOIR | 10591I | Galway | 20 | 10.00 | 13 | 0 |
| SCOIL BRIDE | 18309G | Galway | 20 | 10.00 | 15 | 0 |
| S N PADRAIG NAOFA | 17793J | Galway | 18 | 9.00 | 10 | 0 |
| S N BAILE AN LEASA | 17760R | Galway | 17 | 8.50 | 11 | 0 |
| BALLYCONEELY N S | 19290Q | Galway | 15 | 7.50 | 8 | 0 |
| INISHBOFIN N S | 13927H | Galway | 15 | 7.50 | 10 | 0 |
| S N na Naomh Uile | 13821O | Galway | 15 | 7.50 | 8 | 0 |
| SCOIL RONAIN | 14724V | Galway | 15 | 7.50 | 9 | 0 |
| S N EOIN POL II | 20210W | Galway | 14 | 7.00 | 9 | 0 |
| S N ARD | 14421D | Galway | 13 | 6.50 | 7 | 0 |
| S N INIS MEADHOIN | 12339I | Galway | 13 | 6.50 | 7 | 0 |
| S N NAOMH PADRAIG | 12106I | Galway | 13 | 6.50 | 8 | 0 |
| S N PADRAIG NAOFA | 14273O | Galway | 12 | 6.00 | 7 | 0 |
| S N NAOMH COLMAIN | 17770U | Galway | 10 | 5.00 | 7 | 0 |
| S N NAOMH ANTOINE | 12095G | Galway | 2 | 2.00 | 2 | 0 |