Dissertation (MA Public Administration)This study assessed the efficacy of communications regulation in the prevention of content cybercrimes in Tanzania, whereby Dar-es-Salaam City was used as a case of study. The study was guided by the specific objectives which aimed at exposing out the extent to which content cybercrimes prevail in Tanzania; effect of the National ICT policy on containing content cybercrimes in the locality; to show the level of content cybercrimes prevention done by communications regulatory instruments in Tanzania, and to uncover the capacity TCRA has, in curtailing false information against the government in Tanzania. The study used mixed methods research approach, whereby quantitative and qualitative techniques were used in data collection, analysis and presentation. The study employed a sample size of 77 participants involving 70 citizens as respondents and 7 public officials (from police force and TCRA) as key informants. Questionnaires, interview guides and documentary check list were employed to collect data. Data analyses have been done through the use of both SPSS and content based techniques to give out statistical and expressive findings. Quantitative data have been presented through frequencies and percentages in tables and figures, while qualitative ones have been put in form of statements and quotations for interpretations. The study has revealed that the government has established the ICT policy, laws and provides resource to regulate communications and maintain cyber-security in the country. However, content cybercrimes was revealed to prevail in high levels due to lack of intensive awareness to public on repercussions of content cybercrimes; insufficient resources (manpower, offices and funds); lack of modern technology to instantly and efficiently report, detect and investigate the occurrence of content cybercrimes; lack of friendly institutional framework that is closer to clients; weakness in legal and policy frameworks, lack of cooperation from the private sector during crime‟s investigation. Therefore, the existing challenges seem to affect negatively the efficacy of communications regulation of which calls for remedial government action. The study recommends that that the government should improve legal and institutional frameworks and provide adequate and reliable resources and trainings to responsible institutions to effectively regulate communications and ensure cyber-security in the country.