2022/2023 KCSE top, best schools in Eastern Region; Official list
| Position Nationally | Name of School | Mean Score | Region | County | Mean Grade |
| 24 | Matinyani Secondary | 9.942 | Eastern | Kitui | B+{plus} |
| 48 | Kitui School | 9.312 | Eastern | Kitui | B{plain} |
| 56 | Mt Carmel girls | 9.2353 | Eastern | Makueni | B{plain} |
| 65 | KATHIANI GIRLS HIGH | 9.1235 | Eastern | Machakos | B{plain} |
| 81 | Mbooni Girls | 8.911 | Eastern | Makueni | B{plain} |
| 106 | AIC Sombe Girls | 8.545 | Eastern | Kitui | B{plain} |
| 115 | MAKUENI BOYS | 8.399 | Eastern | Makueni | B-{minus) |
| 136 | ST CHARLES LWANGA SCHOOL KITUI | 8.18 | Eastern | Kitui | B-{minus) |
| 142 | MUTHALE GIRLS HIGH | 8.11 | Eastern | kitui | B-{minus) |
| 151 | MACHAKOS BOYS | 8.0081 | Eastern | Machakos | B-{minus) |
| 155 | KISASI SECONDARY | 7.965 | Eastern | kitui | B-{minus) |
| 160 | KYANG’ONDU SECONDARY | 7.905 | Eastern | Makueni | B-{minus) |
| 177 | CARING HEARTS HIGH SCHOOL | 7.76 | Eastern | Machakos | B-{minus) |
| 193 | MISYANI GIRLS HIGH | 7.4823 | Eastern | Machakos | C+{plus} |
| 220 | Machakos Girls | 7.1406 | Eastern | Machakos | C+{plus} |
| 224 | Makueni Girls | 7.102 | Eastern | Makueni | C+{plus} |
| 230 | THE KITONDO SCHOOL | 7.04 | Eastern | Makueni | C+{plus} |
| 235 | Kabaa High | 6.98 | Eastern | Machakos | C+{plus} |
| 237 | ST ANGELAS GIRLS SECONDARY | 6.935 | Eastern | Kitui | C+{plus} |
| 241 | MBOONI BOYS HIGH | 6.5 | Eastern | Makueni | C+{plus} |
| 243 | MASINGA BOYS HIGH | 6.455 | Eastern | Machakos | FALSE |