| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| S N NAOMH MHUIRE | 17351A | Waterford | 641 | 26.21 | 29 | 0 |
| S N URSULA NAOFA | 12535I | Waterford | 620 | 23.38 | 26 | 0 |
| Presentation Primary School | 19955T | Waterford | 446 | 18.04 | 22 | 0 |
| S N DEAGLAN | 16976M | Waterford | 396 | 24.75 | 29 | 0 |
| Waterford Educate Together NS | 20160K | Waterford | 386 | 23.38 | 26 | 0 |
| ST STEPHENS N S | 15046I | Waterford | 363 | 19.83 | 25 | 0 |
| MOUNT SION CBS N S | 19947U | Waterford | 360 | 21.38 | 23 | 0 |
| SCOIL LORCAIN BNS | 18462O | Waterford | 345 | 20.06 | 23 | 0 |
| ST SAVIOURS NS | 19511G | Waterford | 330 | 19.88 | 24 | 0 |
| OUR LADY OF MERCY SENIOR P.S. | 18689T | Waterford | 292 | 20.71 | 24 | 0 |
| ST PAULS B N S | 20219R | Waterford | 267 | 15.94 | 20 | 0 |
| Scoil Naomh Eoin le Dia | 18793O | Waterford | 237 | 26.33 | 31 | 3 |
| WATERPARK N S | 20143K | Waterford | 235 | 23.50 | 30 | 5 |
| An Teaghlaigh Naofa Girls Junior National School | 18509O | Waterford | 234 | 16.50 | 20 | 0 |
| Gaelscoil na nDeise | 20050D | Waterford | 225 | 21.30 | 29 | 0 |
| S N MUIRE AN PORT MOR | 18235D | Waterford | 212 | 23.56 | 29 | 0 |
| GAELSCOIL PHORT LAIRGE | 19853L | Waterford | 207 | 25.88 | 30 | 1 |
| OUR LADY OF GOOD COUNSEL GNS | 12007G | Waterford | 187 | 23.38 | 27 | 0 |
| CHRIST CHURCH N S | 18681D | Waterford | 114 | 22.80 | 26 | 0 |