| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| S N MHUIRE | 18151U | Donegal | 218 | 23.56 | 29 | 0 |
| SCOIL MHUIRE | 19491D | Donegal | 206 | 25.75 | 30 | 1 |
| Scoil Eoin Baiste | 19252I | Donegal | 136 | 26.20 | 30 | 1 |
| RATHMULLEN N S | 15729N | Donegal | 119 | 23.80 | 27 | 0 |
| SCOIL NAOMH CHOLMCILLE | 18241V | Donegal | 68 | 22.67 | 25 | 0 |
| S N NAOMH BRID | 19228L | Donegal | 66 | 22.00 | 31 | 1 |
| SCOIL MHUIRE | 18120J | Donegal | 64 | 21.33 | 22 | 0 |
| S N CEATHRU CAOL | 17549V | Donegal | 53 | 17.67 | 26 | 0 |
| BROWNEKNOWE N S | 07464H | Donegal | 48 | 16.00 | 19 | 0 |
| CRANFORD N S | 19009W | Donegal | 48 | 16.00 | 19 | 0 |
| SCOIL CHOLMCILLE | 18766L | Donegal | 37 | 18.50 | 21 | 0 |
| DRUMFAD N S | 16137Q | Donegal | 35 | 17.50 | 18 | 0 |
| ST GARVANS N.S. | 16850N | Donegal | 33 | 16.50 | 19 | 0 |
| AYR HILL N S RAMELTON | 18251B | Donegal | 32 | 16.00 | 18 | 0 |
| SCOIL CHOLUIM | 16279N | Donegal | 30 | 15.00 | 18 | 0 |
| ST DAVADOGS N S | 16471F | Donegal | 27 | 13.50 | 14 | 0 |
| PORTLEAN N S | 19235I | Donegal | 20 | 10.00 | 14 | 0 |