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Municipal waste has become a severe problem in the developed and developing countries during the last century. Among these are various waste materials from food, packing, commercial materials ect; however the main constituent of municipal wastes is organic wastes ect. Citric acid commercially important product used in several industrial processes. Production of citric acid by Aspergillus niger from different varieties of banana peel such as green banana and yellow banana in surface culture process was studied. It was found that the maximum amount of citric acid (87%) was produced from yellow banana peel used culture.Lower citric acid (45%) was obtained from green banana peel used culture. By the extension of the fermentation (upto 25 days) resulted in an increase in citric acid concentration and biomass. The potential of Banana peels as a substrate for citric acid production by A.niger was investigated. Addition of supplements significantly enhanced the yield of citric acid. Of the three cultures examined, A.niger UABN 210 was found to produce the highest amount of citric acid (82.0g/Kg dry weight ) after 96h of growth at 30�C in the presence of methanol (1%v/v) and copper ions(10ppm) . The yield of citric acid was over 90% based on the amount of sugar consumed. The study presents banana peel as an inexpensive medium for the production of citric acid by Aspergillus niger.