Rural Population (persons)
| 2009 |
| Kakamega | 1,408,040 |
| Meru | 1,401,036 |
| Bungoma | 1,076,367 |
| Kisii | 991,840 |
| Kitui | 872,800 |
| Nakuru | 868,300 |
| Mandera | 840,188 |
| Homa Bay | 825,743 |
| Kilifi | 824,253 |
| Narok | 792,426 |
| Makueni | 780,230 |
| Bomet | 759,580 |
| Siaya | 751,677 |
| Muranga | 746,876 |
| Turkana | 733,680 |
| Kiambu | 656,309 |
| Trans Nzoia | 651,337 |
| Nandi | 650,684 |
| Busia | 621,756 |
| Migori | 605,658 |
| Wajir | 565,086 |
| Uasin Gishu | 548,620 |
| Kwale | 532,255 |
| Machakos | 527,229 |
| Nyeri | 523,941 |
| Baringo | 494,010 |
| Nyandarua | 485,750 |
| Garissa | 476,392 |
| West Pokot | 469,994 |
| Kisumu | 461,189 |
| Kirinyaga | 444,650 |
| Embu | 433,291 |
| Nyamira | 418,672 |
| Kajiado | 402,450 |
| Vihiga | 380,517 |
| Kericho | 362,372 |
| Elgeyo Marakwet | 316,812 |
| Laikipia | 300,110 |
| Marsabit | 227,157 |
| Taita Taveta | 220,368 |
| Tana River | 204,010 |
| Samburu | 185,283 |
| Tharaka Nithi | 121,563 |
| Lamu | 81,301 |
| Isiolo | 80,920 |