A Dissertation submitted in partial fulfillment for the requirements for the award of the Degree of masters of Public Administration (MPA) of Mzumbe UniversityThe participation of juveniles in committing of crimes in society has not only affected the juveniles’ social and economic development but has also posed a threat on governmental activities or programs for enhancing the social development of the youths in particular. This being the case, many social actors who have interest in the general welfare of the youths have raised concern on the protection of juveniles and this social platform has seen an increase in the civil society organizations being engaged in the control of juvenile delinquency in Tanzania. The main objective of the study was to examine the role of civil society organizations in controlling juvenile delinquency in Tanzania with a case study of Kinondoni district, Dar es Salaam. The study involved an investigation on the role of civil society organization in controlling juvenile delinquency in terms of the examining the mechanism used by CSO’s in controlling juvenile delinquency, the nature of services provided by CSO’s to the juvenile delinquents, the policy initiatives undertaken by the CSO’s in controlling juvenile delinquency and the challenges faced by the CSO’s in the process of controlling juvenile delinquency and at the end of the study, recommendations have been made on what should be done by CSO’s in improving the way they participate in the control of juvenile delinquency in Tanzania. Additionally, the study involved a sample size of 65 respondents composed of the national civil society organization; the faith based civil society organizations and the international based civil society organizations. The findings of the study indicate that the CSO’s use various mechanisms in controlling juvenile delinquency CSO’s use mechanism in controlling juvenile delinquency at almost 75.4%, they network through the Tanzania child forum at 64.4%, they provide services to juvenile delinquents at 60.0%, they participate in policy initiatives at 29.2% and they are faced with challenges including political oppression, competition from the public sector and inadequate funding and this equivalent to 67.2%. Therefore, civil societies and especially those dealing in children welfare should objectively and strategically strengthen their networking forums especially through the Tanzania child forum and seek political empowerment from the Government.