Dissertation (Master in International Relations)This research examines the role of foreign policy to the national economy in Tanzania. The study focuses on attaining determination of the use of foreign policy and its impact on the national economy. The study involved the Ministry of Foreign Affairs and Cooperation, Tanzania Economic Processing Zone and two Universities colleges. A surveying interviews and questionnaire methods were used to collect data. The data were analyzed using both qualitative and quantitative methods which were analysed through SPSS and content analysis respectively. This study found that the contribution of Tanzania foreign policy to the economic development in the country is viewed in varying degrees. As some respondents indicated that it has contributed to economic development still others stated that it has caused some challenges to the growth of country’s economy. The average between those who supported the contribution of foreign policy to the country’s economy against those who did not support lies between 50%. The findings indicate that economically foreign policy has done a substantial economic development role in Tanzania. However, there some areas where it has not contributed as was expected like in the international trade and the expansion of the internal market. The study, therefore, recommends that the Authorities should continue to implement economic diplomacy by attracting investors to invest in various sectors in the country, by enabling an environment for economic growth and strengthening economic cooperation.