Postal codes in Siaya County, Kenya are part of the national five‑digit postal addressing system used by Posta Kenya to help mail and parcels reach the correct location. Each key town and area in the county has its own postal code that identifies its delivery zone.
Key Information
| Item | Detail |
|---|---|
| County | Siaya |
| Country | Kenya |
| Postal Code Format | 5‑digit numeric |
| Postal Code Prefix | 406xx / 401xx / 403xx |
| 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 Town | 40600 | Alego Usonga |
| Bondo Town | 40601 | Bondo |
| Ndori | 40602 | South Gem |
| Ng’iya | 40603 | Gem |
| Rageng’ni | 40604 | North Uyoma |
| Sidindi | 40605 | Ugunja |
| Ugunja | 40606 | Ugunja |
| Ukwala | 40607 | Ugenya/Ukwala |
| Uranga | 40608 | Gem (East) |
| Usenge | 40609 | Bondo |
| Yala | 40610 | Yala |
| Nyilima | 40611 | Gem/North Gem |
| Sawagongo | 40612 | Gem |
| Madiany | 40613 | Gem |
| Sega | 40614 | Ugenya North |
| Nango | 40615 | West Gem |
| Anyiko | 40616 | Ugenya North |
| Boro | 40620 | Gem |
| Akala | 40139 | Siaya Area |
| Aluor | 40140 | Siaya Area |
| Ramula | 40142 | East Gem |
| Ramba | 40330 | Rarieda |
| Ndigwa | 40630 | South Uyoma |
| Nyadorera | 40631 | Gem |
| Nyamonye | 40632 | Gem |
| Nyawara | 40633 | Central Gem |
| Usigu | 40637 | Bondo/Yimbo East |
About Postal Codes in Siaya
Siaya County uses Kenya’s five‑digit postal code system, where the first digits indicate the county’s postal region and the remaining digits point to specific post offices or delivery centres. Siaya Town (40600) is the main postal hub serving the county headquarters and many surrounding towns. Bondo Town (40601), Yala (40610), and Ugunja (40606) each have distinct codes that help local post offices deliver mail accurately.
Smaller areas such as Sidindi (40605), Ukwala (40607), and Sawagongo (40612) also carry unique identifiers, ensuring reliable mail and parcel service across the county. Some places fall under alternative prefixes due to historic or administrative mail routing, such as Akala (40139) and Aluor (40140), which still serve local delivery needs.