| School | Roll number | County | Total (latest year) | Latest average class size | Largest class | Classes 30+ |
|---|---|---|---|---|---|---|
| SCOIL PHADRAIG | 20230F | Mayo | 338 | 24.14 | 27 | 0 |
| NEWPORT CENTRAL | 19451O | Mayo | 243 | 22.50 | 33 | 1 |
| Gaelscoil na Cuaiche | 20046M | Mayo | 208 | 26.00 | 31 | 3 |
| S N CNOC RUSCAIGHE | 18712L | Mayo | 206 | 22.25 | 27 | 0 |
| S N NAOMH COLM CILLE | 13145A | Mayo | 206 | 25.75 | 32 | 2 |
| BRACKLOON N S | 04796R | Mayo | 145 | 23.33 | 28 | 0 |
| S N FAITCHE | 13555T | Mayo | 137 | 27.40 | 38 | 2 |
| MYNA N S | 16618J | Mayo | 102 | 25.50 | 32 | 1 |
| S N LAINN CILLE | 16904K | Mayo | 66 | 22.00 | 28 | 0 |
| MUIRISC NS | 16832L | Mayo | 49 | 16.33 | 21 | 0 |
| Westport Educate Together National School | 20510L | Mayo | 48 | 16.00 | 18 | 0 |
| CARRAHOLLY N S | 17483R | Mayo | 42 | 14.00 | 16 | 0 |
| HOLY TRINITY NATIONAL SCHOOL | 08302J | Mayo | 41 | 13.67 | 17 | 0 |
| CARRAKENNEDY N S | 15866A | Mayo | 32 | 16.00 | 17 | 0 |
| S N COLM NAOFA | 17682A | Mayo | 27 | 13.50 | 16 | 0 |
| CLOONDAFF N S | 11834N | Mayo | 11 | 5.50 | 6 | 0 |
| S N COILL MOR | 17039V | Mayo | 6 | 6.00 | 6 | 0 |