Ol Kalou is the administrative headquarters of Nyandarua County. Its postal code is 20303, which is used in all major postal offices within the county.
Ol Kalou Postal Service Overview
| Information | Details |
|---|---|
| Primary Postal Code | 20303 |
| Parent County | Nyandarua |
| Main Post Office Location | Gilgil-Nyahururu Road, Ol Kalou |
| Number of Post Offices | – |
| Postal Code Structure | – |
Postal System & Mail Delivery in Ol Kalou
Ol Kalou uses a unified postal code (20303) for all addresses within its urban boundary, except satellite areas like Rurii (20313) and Mirangine (20124) . The main post office on Gilgil-Nyahururu Road offers full services: mail dispatch, EMS courier, P.O. Box rentals, and stamp sales . Mail delivery covers the contiguous built-up area defined by Urban Boundary Verification (UBV), though remote homesteads require collection from the main office. Private PO Boxes remain essential for secure delivery, as door-to-door service is limited to central commercial streets .
Ol Kalou Postal Codes
| No. | Place Name (Official) | Category | Location / Area | Postal Code |
|---|---|---|---|---|
| 1 | Ol Kalou G.P.O. | General Post Office | Gilgil–Nyahururu Road | 20303 |
| 2 | Ol Kalou Sub-County Offices | Government Office | Town Center | 20303 |
| 3 | Ol Kalou Health Centre | Healthcare | Gilgil–Nyahururu Road | 20303 |
| 4 | Equity Bank Ol Kalou | Financial | Market Street | 20303 |
| 5 | Ol Kalou Central Market | Market | Off Nyahururu Highway | 20303 |
| 6 | Mirangine Trading Centre | Business Landmark | Mirangine (satellite area) | 20124 |
| 7 | Rurii Market | Market | Rurii (satellite area) | 20313 |