| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| RAPHOE CENTRAL N S | 16138S | Donegal | 185 | 26.43 | 32 | 2 |
| GLEBE NS | 17831O | Donegal | 121 | 24.20 | 28 | 0 |
| ROBERTSON N S | 18731P | Donegal | 89 | 22.25 | 28 | 0 |
| ROBERTSON N S | 13872I | Donegal | 67 | 22.33 | 25 | 0 |
| RAY N S | 14941G | Donegal | 51 | 17.00 | 19 | 0 |
| S N BAILE AN BHAILSIG | 18703K | Donegal | 47 | 23.50 | 24 | 0 |
| KILBARRON N S | 10595Q | Donegal | 44 | 14.67 | 18 | 0 |
| S N DONAIGH | 18939Q | Donegal | 33 | 16.50 | 17 | 0 |
| MOVILLE N S | 15763N | Donegal | 32 | 16.00 | 17 | 0 |
| CREESLOUGH N S | 10062E | Donegal | 31 | 15.50 | 16 | 0 |
| BUNCRANA N S | 16854V | Donegal | 26 | 13.00 | 14 | 0 |
| DUNFANAGHY N S | 18086M | Donegal | 24 | 12.00 | 14 | 0 |
| KILLYGORDAN N S | 18874O | Donegal | 22 | 11.00 | 12 | 0 |
| GARTAN N S | 13755E | Donegal | 19 | 9.50 | 11 | 0 |
| ARDARA MIXED N S | 01733B | Donegal | 12 | 6.00 | 7 | 0 |
| KILLAGHTEE N S | 19089A | Donegal | 12 | 6.00 | 7 | 0 |
| S N BAILE MOR | 18250W | Donegal | 7 | 3.50 | 5 | 0 |