| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| SN CROI MUIRE | 17727T | Mayo | 127 | 25.40 | 30 | 1 |
| CORCLOUGH NS | 15014S | Mayo | 79 | 19.75 | 22 | 0 |
| SN INBHEAR | 12568A | Mayo | 67 | 22.33 | 24 | 0 |
| S N EACHLEIME | 12373I | Mayo | 64 | 21.33 | 25 | 0 |
| SN GLEANN A CHAISIL | 13222P | Mayo | 64 | 16.33 | 18 | 0 |
| SCOIL CHROÍ RÓ NAOFA BEANNCHOR IORRAIS | 13684H | Mayo | 61 | 20.33 | 22 | 0 |
| S N BEAL AN MHUIRTHEAD | 17923T | Mayo | 58 | 19.33 | 21 | 0 |
| S N ACHAIDH AN GHLAISIN | 18594I | Mayo | 48 | 16.00 | 21 | 0 |
| GEESALA CENTRAL SCHOOL | 19776T | Mayo | 29 | 14.50 | 15 | 0 |
| S N POL A TSOMAIS | 16283E | Mayo | 27 | 13.50 | 16 | 0 |
| S N Dhumha Thuama | 14193Q | Mayo | 26 | 13.00 | 16 | 0 |
| BARNATRA N S | 14188A | Mayo | 24 | 12.00 | 12 | 0 |
| CILL MHOR IORRAIS | 14258S | Mayo | 20 | 10.00 | 10 | 0 |
| S N AN TSRAITH | 13383Q | Mayo | 15 | 7.50 | 8 | 0 |
| S N DRUIM SLAOD | 17532E | Mayo | 8 | 4.00 | 4 | 0 |