KCSE 2022-2023 Ranking of Best 100 Schools in Kisii County (Final Official Update)
| Position Nationally | Name of School | Region | County | Mean Score | Mean Grade |
| 2 | CARDINAL OTUNGA | NYANZA | Kisii | 10.76 | A-{minus} |
| 14 | ST. PAULS IGONGA | NYANZA | Kisii | 10.24 | B+{plus} |
| 15 | Igonga DOK Secondary | NYANZA | Kisii | 10.24 | B+{plus} |
| 51 | MOBAMBA HIGH | NYANZA | Kisii | 9.284 | B{plain} |
| 58 | Kiage Tumaini High | NYANZA | Kisii | 9.23 | B{plain} |
| 66 | KISII SCHOOL | NYANZA | Kisii | 9.12 | B{plain} |
| 85 | Moteiribe Secondary | NYANZA | Kisii | 8.859 | B{plain} |
| 88 | Nyamagwa girls | NYANZA | Kisii | 8.823 | B{plain} |
| 101 | NYABURURU GIRLS | NYANZA | Kisii | 8.631 | B{plain} |
| 102 | Nyabite DOK Secondary | NYANZA | Kisii | 8.601 | B{plain} |
| 103 | NYAKOIBA HIGH | NYANZA | Kisii | 8.6 | B{plain} |
| 127 | BOGICHONCHO PAG | NYANZA | Kisii | 8.275 | B-{minus) |
| 153 | SAMETA HIGH | NYANZA | Kisii | 8.0637 | B-{minus) |
| 154 | NYABISASE MIXED | NYANZA | Kisii | 8.025 | B-{minus) |
| 155 | AMASEGE SDA | NYANZA | Kisii | 8.023 | B-{minus) |
| 156 | AMABUKO SEC | NYANZA | Kisii | 8.011 | B-{minus) |
| 172 | Riokindo Boys | NYANZA | Kisii | 7.83 | B-{minus) |
| 178 | Maroo Esinde | NYANZA | Kisii | 7.795 | B-{minus) |
| 188 | Omwari Secondary | NYANZA | Kisii | 7.647 | B-{minus) |
| 197 | Moi Gesusu | NYANZA | Kisii | 7.49 | C+{plus} |
| 202 | Mokubo Secondary | NYANZA | Kisii | 7.46 | C+{plus} |
| 214 | Kereri Girls High | NYANZA | Kisii | 7.312 | C+{plus} |
| 216 | Riooga Secondary | NYANZA | Kisii | 7.3 | C+{plus} |
| 220 | Itierio Girls | NYANZA | Kisii | 7.28 | C+{plus} |
| 243 | Ibacho High | NYANZA | Kisii | 7.053 | C+{plus} |
| 246 | Nyamagwa Boys | NYANZA | Kisii | 7.0269 | C+{plus} |
| 249 | Ichuni girls | NYANZA | Kisii | 7 | C+{plus} |
| 285 | Nyabigena Boys | NYANZA | Kisii | 5.88502 | C (plain) |