The present study was aimed to evaluate the antioxidants and antibacterial activities of Tectona grandis (teak) leaves extracts. The extracts of this plant also found applications in many of the traditional medicines. In-vitro antioxidant activity of ethanolic extract of Tectona grandis Linn. by using phosphomolybednum, DPPH assay and H2O2 radical scavenging assay. The results were compared with ascorbic acid as a standard. The antibacterial activities were assay of ethanolic extract (Tectona grandis Linn.) by using the agar well nutrient broth method. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were evaluated using standard microbiological techniques. They showed a high significant antibacterial activity against Bacillus subtilis, Escherichia coli, Staphylococcus aureus, Lacto bacillus and Klebsiella pneumoniae. Phytochemical studies of the extracts were determined. Appreciable quantities of phytochemical such as saponins, tannins, flavonoids, glycosides, anthraquinone and alkaloids were present in both extracts of the plants with flavonoids having a higher percentage.