Abstract: This study assessed the impact of Islamic based programs on rehabilitation of Muslim inmates the case of Shimo La Tewa prisons, Kenya. Observably , although a considerable number of the studies had been carried out on the welfare of inmates in Kenyan prisons, there has been no study to the best of the researchers knowledge that focus on the impact of the faith based program on the lives of the inmates as this study attempted to . The objectives that guided the study were; to trace the historical incorporation of Islamic based rehabilitation programs in Kenya Prisons; to investigate the various Islamic based rehabilitation programs being implemented to rehabilitate Muslims inmates in Shimo La Tewa Prison; to examine the challenges facing the implementation of Islamic based rehabilitation programs in Shimo La Tewa main prison and finally to assess the impact of Islamic based rehabilitation programs on rehabilitation of Muslim inmates in Shimo La Tewa Prison.