The study analyzed the cost-benefit of Fresh catfish marketing in Kano State Nigeria. Multi-stage sampling technique was employed for the study. Kano is grouped into three agricultural zones: namely Zone I, Zone II, and Zone III. One Local Government Area was purposively selected from each zone based on the performance of fish farming and marketing. Bebeji Local Government Area was selected from Zone I, Bagwai Local Government Area was selected from zone II, and Fagge Local Government Area was selected from zone III. A total number of 32 wholesalers and 95 retailers where used for the study fish marketers were used to form the sample frame for the research. The data collected were analyzed using descriptive statistics, net marketing merging cost and return analysis and Gini co-efficient cost and return analysis The result of costs and returns analysis showed that fresh catfish marketing was found to be profitable because the total cost 56,506.88 and the revenue was N 54,556.88 which gave net Marketing Merging of N.9578.375. The return per naira invested was 1.16 kobo as profit. However, fresh catfish marketing in the study area shows that the Gini coefficient of 0.583 indicates a high level of concentration and consequently high inefficiency in the market structure. Following the findings of this research work, it could be concluded that fresh catfish marketing was dominated by male middle age group, mostly married with informal education, majority of fresh catfish marketers sourced funds for this business from their personnel savings. Fresh catfish marketers were also found to be profitable because every amount of money invest there will be a return from the investment.