The Eastern Region of Kenya comprises eight counties with postal codes ranging from 60100 to 90300, organized into distinct geographic and administrative clusters. These counties in these region have differet postal code range with Machakos ( 90100–90409), Makueni (90300–90409), Kitui (90200–90409), Meru (60200–60205), Tharaka Nithi (60400–60411), Embu (60100–60119), Isiolo (60300–60303), and Marsabit (60500–60502)
Eastern Region at a Glance
| Regional Information | Details |
|---|---|
| Total Counties | 8 |
| County Names | Machakos, Makueni, Kitui, Meru, Tharaka Nithi, Embu, Isiolo, Marsabit |
| Postal Code Range | 60100–90409 |
| Regional Area (sq km) | 159,891 |
| Total Population (2023) | 6.2 million |
| Regional Headquarters | Machakos Town |
| Major Economic Activities | Agriculture, logistics, renewable energy |
| Primary Languages | Kamba, Meru, Somali |
| Climate Zones | Semi-arid (70%), temperate highlands (30%) |
| Major Transportation Hubs | Isiolo Airport, Embu Highway Hub |
| Regional Postal Centers | Machakos GPO (90100), Embu Main (60100) |
| Cross-Border Points | Moyale (Ethiopia border) |
| Main Commercial Centers | Machakos City, Meru Town |
Regional Administrative Structure
The Eastern Region is governed by a dual administrative hierarchy led by a Regional Commissioner, which coordinates security and national government services. This structure operates parallel to devolved county governments, creating integrated service delivery frameworks. The Regional Commissioner chairs the Eastern Regional Security Council, which interfaces with county governors on cross-border issues, such as cattle rustling along the Meru-Isiolo border and standardization of postal services.
Each county maintains autonomous governance under elected governors, with sub-counties headed by Deputy County Commissioners and wards supervised by Chiefs. The region hosts the Meru-Tharaka Nithi-Embu Tri-County Initiative, harmonizing agricultural and postal services.
Eastern Kenya Postal Code
| County | Headquarters | Postal Code | Major Towns |
| Machakos | Machakos Town | 90100 | Athi River (0204), Kangundo (90115) |
| Makueni | Wote | 90300 | Wote (90300), Mtito Andei (90128) |
| Kitui | Kitui Town | 90200 | Mwingi (90400), Mutomo (90201) |
| Embu | Embu Town | 60100 | Runyenjes (60103), Siakago (60104) |
| Meru | Meru Town | 60200 | Maua (60202), Nkubu (60204) |
| Tharaka Nithi | Kathwana | 60400 | Chuka (60400), Marimanti (60215) |
| Isiolo | Isiolo Town | 60300 | Merti (60303), Garba Tulla (60301) |
| Marsabit | Marsabit Town | 60500 | Moyale (60700), Laisamis (60502) |