Population, Female (persons)
| 2009 |
| Nairobi | 1,533,139 |
| Kakamega | 859,662 |
| Kiambu | 820,673 |
| Nakuru | 798,743 |
| Bungoma | 703,515 |
| Meru | 685,645 |
| Kisii | 601,818 |
| Kilifi | 574,209 |
| Machakos | 555,445 |
| Kitui | 531,427 |
| Homa Bay | 501,340 |
| Kisumu | 494,149 |
| Muranga | 484,717 |
| Migori | 472,814 |
| Mandera | 465,813 |
| Makueni | 453,817 |
| Mombasa | 452,446 |
| Uasin Gishu | 445,185 |
| Siaya | 443,652 |
| Narok | 421,894 |
| Trans Nzoia | 411,585 |
| Turkana | 410,330 |
| Busia | 387,824 |
| Nandi | 376,477 |
| Kericho | 376,359 |
| Bomet | 364,459 |
| Nyeri | 353,833 |
| Kajiado | 342,166 |
| Kwale | 333,934 |
| Nyamira | 311,204 |
| Nyandarua | 304,113 |
| Wajir | 298,175 |
| Vihiga | 291,906 |
| Garissa | 288,121 |
| Baringo | 276,480 |
| Kirinyaga | 267,424 |
| Embu | 261,909 |
| West Pokot | 257,863 |
| Laikipia | 200,602 |
| Tharaka Nithi | 186,879 |
| Elgeyo Marakwet | 186,260 |
| Marsabit | 140,054 |
| Taita Taveta | 139,323 |
| Tana River | 120,222 |
| Samburu | 111,940 |
| Isiolo | 69,600 |
| Lamu | 48,494 |