This study was conducted on economics of sweet potato marketing in Zing Local Government Area, Taraba State, Nigeria. The specific objectives were to: identify the socio economic characteristics of sweet potato marketers in the study area, estimate the marketing margin and marketing efficiency of sweet potato marketing in the study area, identify the factors affecting sweet potato marketing in the area and determine the constraints faced by the traders in marketing the crop. Data for this study were collected using structured questionnaire. Purposive and simple random sampling techniques were used to select respondents for the study. The data collected were analysed using descriptive and inferential statistics. The socio-economic characteristics result showed that about 77.6% of the sweet potato marketers were male, 91.8% of the respondents were young people whose ages ranged between 28 to 57 years with 63.3% married marketers. The result revealed that 83.7% of the sweet potato marketers had formal education, 83.7% marketers did not belong to any cooperative organization, 79.59 % of marketers had no access to credit to finance their sweet potato marketing activities and 42.9% had 6-10years’ experience in sweet potato trading. The result shows that the gross marketing margin and net marketing margin were N6,921.28 and N6,571.28 respectively with marketing efficiency of 0.59koko.The logit regression result revealed that out of the 10 independent variables included in the model, 8 variables were statistically significant at 1% (p<0.01), 5% (p<0.05) and 10% (p<0.10) respectively representing 80% of the variables. The result reveals that, inadequate capital, low profit, inadequate and poor storage facilities, price fluctuation and lack of standard measure were some of the problem identified as problems militating against Sweet Potato marketing in the study area. Sweet potato marketing is a profitable business with attractive net return and investment in Zing LGA of Tarab