Quick Answer: Bomet County’s main postal code is 20400 for the Bomet GPO, the county headquarters. The county has 5 sub-counties and uses multiple codes: 20402 for Longisa (Bomet East), 20406 for Sotik, 20405 for Sigor (Chepalungu), 20401 for Chebunyo, and 20403 for Mogogosiek (Konoin). Always use the specific code for your area.
Are You Looking for the Correct Postal Code in Bomet? You are in the right place. Bomet County is a county in the former Rift Valley Province of Kenya, designated as County Number 036 under the 2010 Kenyan Constitution. The county headquarters and capital are Bomet Town, which hosts the county’s General Post Office (GPO) under postal code 20400.
Bomet County covers an area of 2,507.1 km² and had a population of 875,689 according to the 2019 Kenya National Census. It is bordered by Kericho to the north, Nyamira to the west, Narok to the south, and Nakuru to the north-east. The county is the source of the famous Mara and Itare rivers, which flow into Lake Victoria. It lies between Latitudes 0° 29′ and 1° 03′ South and between Longitudes 35° 05′ and 35° 35′ East.
What Are Bomet Postal Codes?
A Bomet postal code is a five-digit number assigned by Posta Kenya (the Postal Corporation of Kenya) to identify specific post offices within the county. All Bomet County postal codes begin with the digit 2, placing the county under the Nakuru postal region. This is because Bomet was historically part of the former Kericho District before becoming its own district in 1992, and the postal infrastructure inherited the Region 2 prefix.
How to read a Bomet postal code: Take the code 20400. The digit 2 identifies the Nakuru postal region, and 0400 identifies the specific Bomet GPO. Similarly, 20402 = region 2 + Longisa post office (0402), and 20406 = region 2 + Sotik post office (0406).
Important: Like most Kenyan counties, Bomet does not have widespread door-to-door street delivery. Most residents and businesses use a P.O. Box number at their nearest post office combined with the correct postal code. When filling out forms or shipping addresses, always use the specific postal code for your nearest post office, not the general county code of 20400.
All 5 Bomet Sub-Counties and Their Postal Codes
Bomet County is divided into 5 sub-counties (which also serve as the 5 constituencies), containing 25 electoral wards, 66 locations, 177 sub-locations, and 1,977 villages.
| Sub-County | Main Postal Code(s) | Main Town / Centre | Wards | Area (km²) |
|---|---|---|---|---|
| Bomet Central | 20400, 20221, 20411, 20418, 20419, 20422, 20426 | Bomet Town | 5 | 266 |
| Bomet East | 20402, 20407, 20414, 20417, 20424 | Longisa | 5 | 311.3 |
| Chepalungu | 20401, 20405, 20410, 20412, 20415, 20423 | Sigor | 5 | 535.8 |
| Sotik | 20404, 20406, 20413, 20421 | Sotik Town | 5 | 479.2 |
| Konoin | 20403, 20409, 20416, 20225 | Mogogosiek | 5 | 445.1 |
Sub-County Postal Code Breakdown
1. Bomet Central Sub-County — Postal Code: 20400
Bomet Central is the administrative hub of the county, home to Bomet Town, the county headquarters. The Bomet GPO (20400) is located here and is the primary post office serving the entire county for formal and official correspondence.
Wards: Mutarakwa, Silibwet Township, Singorwet, Chesoen, Ndaraweta
| Area / Location | Postal Code | Notes |
|---|---|---|
| Bomet Town (GPO) | 20400 | County HQ, main post office, full services |
| Kaptebengwet | 20221 | Bomet Central area sub-office |
| Gorgor | 20411 | Rural sub-office, Bomet Central |
| Makimeny | 20418 | Sub-office serving Bomet Central wards |
| Merigi | 20419 | Merigi area postal sub-office |
| Silibwet | 20422 | Silibwet Township ward area |
| Ndaraweta | 20426 | Ndaraweta ward sub-office |
Key institutions in Bomet Central:
- Tenwek Hospital (Level 5, 400-bed Teaching & Referral Mission Hospital) — P.O. Box 39 – 20400
- Tenwek Hospital Annex (Silibwet Road, Bomet Town) — 20400
- Bomet County Government Headquarters — P.O. Box 19 – 20400
- Bomet County Assembly — 20400
- Bomet Health Center (site of new Level 4 Hospital, 2026) — 20400
2. Bomet East Sub-County — Postal Code: 20402 (Longisa)
Bomet East is home to Longisa town, which hosts the county’s main referral hospital. The sub-county is located east of Bomet Town along the Bomet–Narok Road and is known for dairy farming and agricultural activity.
Wards: Longisa, Kembu, Chemaner, Merigi, Kipreres
| Area / Location | Postal Code | Notes |
|---|---|---|
| Longisa | 20402 | Main post office, Bomet East HQ |
| Chemaner | 20407 | Chemaner ward sub-office |
| Kapkesosio | 20414 | Sub-office, Bomet East |
| Koiwa | 20417 | Sub-office, Bomet East |
| Amalo (formerly Oloomirani) | 20424 | Sub-office, formerly known as Oloomirani |
Key institutions in Bomet East:
- Longisa County Referral Hospital (Level 5) — 20402
- KMTC Bomet Campus (located at Longisa County Referral Hospital) — 20402
3. Chepalungu Sub-County — Postal Codes: 20401, 20405
Chepalungu is the largest sub-county by area in Bomet County, covering 535.8 km². It is a highland area known for tea farming and a diverse range of agricultural production. The sub-county headquarters is at Sigor town.
Wards: Sigor, Kongasis, Chebunyo, Nyangores, Siongiroi
| Area / Location | Postal Code | Notes |
|---|---|---|
| Chebunyo | 20401 | Main post office, northern Chepalungu |
| Sigor | 20405 | Sub-county HQ post office |
| Cheptalal | 20410 | Sub-office, Chepalungu |
| Kabason | 20412 | Sub-office, Chepalungu |
| Kapkoros | 20415 | Sub-office, Chepalungu |
| Siongiroi | 20423 | Siongiroi ward, southern Chepalungu |
4. Sotik Sub-County — Postal Code: 20406 (Sotik)
Sotik is one of Kenya’s most famous tea-growing regions. The sub-county is home to large commercial tea estates and factories. Sotik town is a busy commercial center with a well-established post office. It borders Nyamira County to the west.
Wards: Kipsonoi, Kapletundo, Chemagel, Ndanai/Abosi, Rongena/Manaret
| Area / Location | Postal Code | Notes |
|---|---|---|
| Sotik Town | 20406 | Main post office, Sotik sub-county HQ |
| Ndanai | 20404 | Ndanai/Abosi ward post office |
| Kapcherany | 20413 | Sub-office, Sotik area |
| Olbutyo | 20421 | Sub-office, Sotik |
Key institutions in Sotik:
- Kaplong Boys High School — P.O. Box 115 – 20406, Sotik
- Sotik Tea Factory (KTDA) — 20406
5. Konoin Sub-County — Postal Code: 20403 (Mogogosiek)
Konoin sub-county borders Nyamira County to the west and is another important tea-growing zone. Its headquarters post office is at Mogogosiek. The sub-county is named after the Konoin hills and has a rich agricultural heritage.
Wards: Chepchabas, Mogogosiek, Embomos, Boito, Kimulot
| Area / Location | Postal Code | Notes |
|---|---|---|
| Mogogosiek | 20403 | Main post office, Konoin sub-county |
| Boito | 20409 | Boito ward sub-office |
| Kiplelji | 20416 | Sub-office, Konoin |
| Kimulot | 20225 | Kimulot ward, shared with Kericho region |
Complete List of Bomet County Post Offices
The following is the full list of post offices and postal sub-offices serving Bomet County, with their official Posta Kenya codes:
| Post Office | Postal Code | Sub-County | Key Services |
|---|---|---|---|
| Bomet GPO | 20400 | Bomet Central | Full services, P.O. Boxes, Money Orders, EMS, Huduma |
| Kaptebengwet | 20221 | Bomet Central | Sub-office, P.O. Boxes |
| Chebunyo | 20401 | Chepalungu | P.O. Boxes, postal services |
| Longisa | 20402 | Bomet East | P.O. Boxes, postal services |
| Mogogosiek | 20403 | Konoin | P.O. Boxes, postal services |
| Ndanai | 20404 | Sotik | Sub-office, P.O. Boxes |
| Sigor | 20405 | Chepalungu | Sub-county HQ office, P.O. Boxes |
| Sotik | 20406 | Sotik | Full services, P.O. Boxes, Money Orders |
| Chemaner | 20407 | Bomet East | Sub-office, P.O. Boxes |
| Boito | 20409 | Konoin | Sub-office, basic services |
| Cheptalal | 20410 | Chepalungu | Sub-office |
| Gorgor | 20411 | Bomet Central | Sub-office |
| Kabason | 20412 | Chepalungu | Sub-office |
| Kapcherany | 20413 | Sotik | Sub-office, P.O. Boxes |
| Kapkesosio | 20414 | Bomet East | Sub-office |
| Kapkoros | 20415 | Chepalungu | Sub-office |
| Kiplelji | 20416 | Konoin | Sub-office |
| Koiwa | 20417 | Bomet East | Sub-office |
| Makimeny | 20418 | Bomet Central | Sub-office |
| Merigi | 20419 | Bomet Central | Sub-office |
| Olbutyo | 20421 | Sotik | Sub-office |
| Silibwet | 20422 | Bomet Central | Sub-office, Silibwet Township |
| Siongiroi | 20423 | Chepalungu | Sub-office, Siongiroi ward |
| Amalo (Oloomirani) | 20424 | Bomet East | Sub-office, formerly Oloomirani |
| Ndaraweta | 20426 | Bomet Central | Sub-office, Ndaraweta ward |
| Kimulot | 20225 | Konoin | Sub-office, Kimulot ward |
How to Write a Bomet County Address Correctly
Using the correct postal code in Bomet County ensures your mail and parcels reach the right destination. Here is the standard format for writing a Kenyan postal address in Bomet:
Standard Format:
[Recipient Name]
P.O. Box [Number] – [Postal Code]
[Town/Area Name], BOMET
KENYA
Example 1 – Bomet Town (GPO):
John Kipkoech
P.O. Box 45 – 20400
Bomet Town, BOMET
KENYA
Example 2 – Longisa (Bomet East):
Jane Chebet
P.O. Box 12 – 20402
Longisa, BOMET
KENYA
Example 3 – Sotik:
Peter Mutai
P.O. Box 78 – 20406
Sotik, BOMET
KENYA
Frequently Asked Questions (FAQs)
What is the postal code for Bomet Town?
The postal code for Bomet Town is 20400. This is the General Post Office (GPO) serving as the county headquarters post office, operated by Posta Kenya.
What is the postal code for Sotik?
Sotik’s postal code is 20406. Sotik is the headquarters of Sotik Sub-County and its post office offers full services including P.O. Boxes and Money Orders.
What is the postal code for Longisa?
Longisa uses postal code 20402. It is the main post office for Bomet East Sub-County.
What is the postal code for Sigor in Bomet?
Sigor (in Chepalungu Sub-County) uses postal code 20405. It serves as the Chepalungu Sub-County headquarters post office.
What is the postal code for Chebunyo?
Chebunyo uses postal code 20401. It is the main post office for Chepalungu Sub-County’s western areas.
What is the postal code for Mogogosiek (Konoin)?
Mogogosiek uses postal code 20403. It is the headquarters post office for Konoin Sub-County.
Does Bomet have its own postal code separate from Nairobi?
Yes. Bomet County has its own unique postal codes starting with 204xx, independent of Nairobi. The main code is 20400 for Bomet GPO.
Which post offices in Bomet offer full Posta Kenya services?
The following post offices in Bomet offer full services including P.O. Boxes, registered mail, and Money Orders: Bomet Town GPO (20400), Sotik (20406), Longisa (20402), and Sigor (20405).
For more postal codes across Kenya, visit our Kenya Postal Codes directory.