| Sub-County | Area (Km2) | Human Population (2009) | Farm Families | Av. Family Size | Dairy Population (2012) | Milk Production in Litres (2012) | Earnings from Milk Sales in Kshs. (2012) |
| Rongo | 208.5 | 209,460 | 23,063 | 5 | 3274 | 11,587,625 | 463,505,000 |
| Awendo | 264 | 108,908 | 24,000 | 6 | 667 | 3,360,000 | 120,267,800 |
| Uriri | 380.7 | 115,751 | 23,150 | 5 | 1941 | 2,427,790 | 145,667,400 |
| Kuria West | 390 | 174,253 | 21,243 | 6 | 1199 | 9,066,228 | 362,649,120 |
| Total | 1243.2 | 608,372 | 91,456 | 5 | 7081 | 26,441,643 | 1,092,089,320 |