Postal codes in Siaya County, Kenya are part of the national five‑digit postal addressing system used by Posta Kenya to ensure mail and parcels reach the correct destination. Each major town and delivery centre has its own code to help with accurate sorting and delivery.
Key Information
| Item | Detail |
|---|---|
| County | Siaya |
| Country | Kenya |
| Postal Code Format | 5‑digit numeric |
| Postal Code Prefix | 40xxx |
| Admin System | Posta Kenya |
| Coverage | All official locations in Siaya |
Postal Codes of Siaya
Below is a table showing all key places in Siaya with their postal codes.
| Location Name | Postal Code | District Name |
|---|---|---|
| Siaya | 40600 | Alego Usonga |
| Bondo | 40601 | Bondo |
| Ndori | 40602 | South Gem |
| Ng’iya | 40603 | Gem |
| Rageng’ni | 40604 | North Uyoma |
| Sidindi | 40605 | Ugunja |
| Ugunja | 40606 | Ugunja |
| Ukwala | 40607 | Ukwala |
| Uranga | 40608 | Gem |
| Usenge | 40609 | Gem |
| Yala | 40610 | Gem |
| Nyilima | 40611 | Gem |
| Sawagongo | 40612 | Gem |
| Madiany | 40613 | Gem |
| Sega | 40614 | Ugunja |
| Nango | 40615 | Gem |
| Anyiko | 40616 | Gem |
| Boro | 40620 | Rarieda |
| Lugingo | 40623 | Rarieda |
| Luhano | 40623 | Rarieda |
| Manyuanda | 40625 | Rarieda |
| Misori | 40626 | Rarieda |
| Mutumbu | 40628 | Rarieda |
| Ndigwa | 40630 | Rarieda |
| Nyadorera | 40631 | Rarieda |
| Nyamonye | 40632 | Rarieda |
| Nyawara | 40633 | Rarieda |
| Sigomre | 40635 | Rarieda |
| Hawinga | 40640 | Ugunja |
| Tingwangi | 40645 | Ukwala |
About Postal Codes in Siaya
Siaya County uses Kenya’s five‑digit postal code system to help postal workers and delivery services route mail correctly. The first digits (40) signal the Nyanza postal region, and the full five digits identify specific post offices or delivery zones within the county. Siaya (40600) is the main postal hub for the county headquarters and surrounding delivery areas.
Other major towns like Bondo (40601) and Ugunja (40606) have distinct codes developed for local mail distribution. Smaller towns and centres such as Yala (40610), Sawagongo (40612), Nyilima (40611), Madiany (40613), and Usenge (40609) also have unique identifiers that ensure mail and parcels reach the right place without confusion.
Outlying and rural areas such as Boro (40620), Lugingo (40623), Ndigwa (40630), and Sigomre (40635) each have postal codes tied to their delivery offices, making the system comprehensive across the county. Using the correct postal code when addressing your mail helps ensure timely and accurate delivery across all parts of Siaya County.