Peels of thirteen (13) ripe mango genotypes were analyzed for total phenolic, total flavonoid, vitamin C, vitamin A contents, and antioxidant activity. The observation and data collected from this study showed that there was chemical variation in the peels of different mango genotypes that can be a basis for future breeding work. Furthermore, mango peel was can be a good source of phenolic compounds, vitamins and antioxidants which can be utilized as a functional food, and for nutraceutical, pharmaceutical and cosmeceutical purposes.