| Place | Post Code |
|---|---|
| Chepkorio, Chepkorio | 30129 |
| Cherota, Chepkorio | 30100 |
| Flax, Chepkorio | 30100 |
| Kamelil, Chepkorio | 30100 |
| Kapcheptek, Chepkorio | 30100 |
| Kipsaina, Chepkorio | 30100 |
| Lelboinet, Chepkorio | 30100 |
| Mwen, Chepkorio | 30100 |
| Samich, Chepkorio | 30100 |
| All postal codes in Keiyo South | |
|---|---|
| Chepkorio, Keiyo South | |
| Kabiemit, Keiyo South | |
| Kaptarakwa, Keiyo South | |
| Metkei, Keiyo South | |
| Soy North, Keiyo South | |
| Soy South, Keiyo South | |