Proximate analysis of fresh leaves of Polyalthia longifolia was carried out using gravimetric method of analysis. The analysis showed that percentages of total moisture, crude protein, crude fiber, ash content, total carbohydrate and the oil content were 51.12, 13.37, 25.20, 8.12, 22.97 and 11.34 present in the sample respectively. The results revealed that the fresh leaves could be a rich source of food and mineral nutrients which can be used for human nourishments and dietary supplements. It is also an implication that the leaves can be used in the medicinal, pharmacological and food industries for production of consumable supplements. The significant oil content is an indication of its ability to combat certain microorganisms that can cause disorders in human health, it can also be applied in the cosmetic industries for the production of a wide variety of cosmetics products it has been commonly found that the extract of the leaves can be used as curatives of haemorhoids, diabetes, fibroid. cancer and ulcer treatments because of the reasonable fibre content.