Agricultural extension is one of the effective tools in attaining the millennium development goals related to the reduction and eradication of extreme poverty and hunger in developing countries like Kenya. Despite that extension services were practiced for many years in Kenya, it is evident that these services have declined rapidly. This paper aims to find out the impact of extension on food security among small scale farmers in Wareng District. A survey of 120 smallholder farmers was used in the study. Though there was difference between farmers in different wealth categories, the mean difference is larger at the present compared to the past. Generally extension have played role in improving the living status of farmers in the study area. However, agricultural extension services seems to have an impact on improving food security in the country and increase the wealth gap between farming households and also replace local landraces with improved varieties. The study recommends that the Kenyan government should develop a new and expanded policy agenda for agricultural extension and communication for rural development focusing national attention on food security and income generation of the rural poor
Keywords: Agriculture, Food Security, crops, extension, livestock’s