County by County survey of 4,700 respondents with each county accounting for 100 participants produced results shown below: Margin of error is 1.69% points.
| Entry | County Name | Musalia Mudavadi | Raila Odinga | Uhuru Kenyatta |
| 1 | Baringo County | 1% | 9% | 86% |
| 2 | Bomet County | 2% | 13% | 85% |
| 3 | Bungoma County | 37% | 40% | 23% |
| 4 | Busia County | 17% | 63% | 18% |
| 5 | Elgeyo-Marakwet County | 1% | 4% | 94% |
| 6 | Embu County | 1% | 8% | 90% |
| 7 | Homa Bay County | 2% | 94% | 2% |
| 8 | Garissa County | 1% | 40% | 50% |
| 9 | Isiolo County | 3% | 31% | 61% |
| 10 | Kajiado County | 2% | 39% | 57% |
| 11 | Kakamega County | 34% | 42% | 22% |
| 12 | Kericho County | 3% | 12% | 85% |
| 13 | Kiambu County | 1% | 10% | 89% |
| 14 | Kilifi County | 3% | 77% | 20% |
| 15 | Kirinyaga County | 1% | 2% | 97% |
| 16 | Kisii County | 2% | 72% | 26% |
| 17 | Kisumu County | 1% | 96% | 3% |
| 18 | Kitui County | 3% | 67% | 28% |
| 19 | Kwale County | 2% | 78% | 20% |
| 20 | Laikipia County | 1% | 10% | 89% |
| 21 | Lamu County | 4% | 51% | 45% |
| 22 | Machakos County | 2% | 70% | 28% |
| 23 | Makueni County | 3% | 77% | 19% |
| 24 | Mandera County | 2% | 9% | 89% |
| 25 | Marsabit County | 1% | 45% | 54% |
| 26 | Meru County | 1% | 12% | 85% |
| 27 | Migori County | 2% | 80% | 16% |
| 28 | Mombasa County | 5% | 54% | 38% |
| 29 | Murang’a County | 2% | 4% | 94% |
| 30 | Nairobi County | 13% | 40% | 47% |
| 31 | Nakuru County | 3% | 23% | 74% |
| 32 | Nandi County | 8% | 6% | 84% |
| 33 | Narok County | 1% | 42% | 57% |
| 34 | Nyamira County | 2% | 74% | 24% |
| 35 | Nyandarua County | 1% | 3% | 96% |
| 36 | Nyeri County | 1% | 3% | 96% |
| 37 | Samburu County | 1% | 55% | 44% |
| 38 | Siaya County | 3% | 96% | 1% |
| 39 | Taita Taveta County | 2% | 86% | 12% |
| 40 | Tana River County | 3% | 60% | 37% |
| 41 | Tharaka-Nithi County | 2% | 10% | 88% |
| 42 | Tranz-Nzoia County | 20% | 42% | 37% |
| 43 | Turkana County | 1% | 60% | 39% |
| 44 | Uasin Gishu County | 3% | 24% | 73% |
| 45 | Vihiga County | 48% | 28% | 24% |
| 46 | Wajir County | 2% | 56% | 42% |
| 47 | West Pokot County | 2% | 38% | 60% |
| Totals | 258 (5.49%) | 1,956 (41.6%) | 2,362 (50.2%) |
