| 2009 | |
|---|---|
| Nairobi (City) | 10.324 |
| Kiambu | 3.345 |
| Mombasa | 2.748 |
| Meru | 2.388 |
| Nakuru | 2.271 |
| Machakos | 1.846 |
| Kakamega | 1.791 |
| Nyeri | 1.641 |
| Kilifi | 1.433 |
| Kajiado | 1.430 |
| Bungoma | 1.351 |
| Muranga | 1.306 |
| Kisumu | 1.256 |
| Uasin Gishu | 1.218 |
| Kitui | 1.192 |
| Kisii | 1.033 |
| Kirinyaga | 1.028 |
| Migori | 1.015 |
| Embu | 992 |
| Homa Bay | 980 |
| Trans Nzoia | 977 |
| Nyandarua | 875 |
| Siaya | 858 |
| Narok | 826 |
| Makueni | 816 |
| Kwale | 713 |
| Bomet | 581 |
| Garissa | 552 |
| Vihiga | 547 |
| Laikipia | 542 |
| Kericho | 505 |
| Nandi | 504 |
| Busia | 494 |
| Nyamira | 453 |
| Baringo | 437 |
| Taita Taveta | 353 |
| Mandera | 271 |
| Turkana | 224 |
| Elgeyo Marakwet | 220 |
| Samburu | 165 |
| Isiolo | 154 |
| Lamu | 135 |
| West Pokot | 104 |
| Wajir | 98 |
| Tharaka Nithi | 93 |
| Tana River | 86 |
| Marsabit | 69 |