In Kenya, RVF outbreaks have occurred cyclically in 1996 to 2007. Characterizing RVF vector habitat requirements allows for the identification of areas at risk of viral amplification and transmission. Ecological niche models were developed using records of potential RVF Kenyan vector mosquito species to predict their habitat suitability range and to investigate possible geographical associations with RVF outbreak occurrence in Kenya in 2006 -2007. The contribution of different environmental variables to the niche models was also assessed. Suitable habitats for Culex pipiens, Culex univittatus, Culex quinquefasciatus and Culex zambaensis were widely distributed in the county stretching from the western to the coastal strip while ; Aedes quasiunivittatus, Aedes aegypti were concentrated in Eastern Kenya with occupations in Rift Valley, Central and the coastal areas. High precipitation variables showed the highest predictive power for aedes while length of dry months determined the Culex distribution. It would be important to investigate the contributions of ruminant host population and landscape variables. RVF outbreaks had a significantly higher probability to occur in habitats suitable for both Aedes and Culex species, providing circumstantial evidence that the potential distribution of these two species coincides geographically with the observed distribution of the disease.