A project is a temporary effort aimed at producing or achieving a specific product, service or end in a given way (usually time consuming, and often limited by financing or deliverables, which achieve unique aims typically lead to beneficial changes and added value). It is the objective of every project to be complete within a specified timeline and a specific budget. Therefore to deliver the final services of a project to the end users it must be done in a way that minimizes cost while meeting g the set budget.Despite availability of good project plans; implementation of those plans is challenging since every project presents new setbacks. The implementation of county government development projects/projects has been deemed poor since most projects are incomplete despite large sums of funds being invested in them.Studies conducted on implementation of county government development projects/programme suggest that; inadequate funding, lack of technically qualified personnel to guide the implementation of projects and lack of appropriate skills in management have been among the major setbacks.The purpose of the study will be to examine the challenges facing implementation of county government development projects/programs in Kajiando West Subcounty, Kajiando County, Kenya.The study was carried out using a descriptive survey research design..This study will involveKajiandoWest Subcounty government development projects/programscommitee, being the chairman, treasurer, secretary, Project manager, Project monitoring and evaluation, Project supervisors, and ward administrators, drawn from projects in KajiandoWest Subcounty.The presentation of data included tables, percentages and other measures of central tendency like mean, frequency and standard deviation. To determine the correlation amongst the variables, the Pearson correlation wasapplied. This indicated the level of significance of each variable.