Nature has been a source of various medicines from multiple years. Traditional drugs for about over all urbanizations of the globe bounded in herbal treatments. Due to the presence of many biochemicals, plant extracts have antioxidant property. In this investigation, methanolic extracts of stem-bark of the selected trees (Holoptelia integrifolia, Pscidium guajava, Pongamia pinnata, Syzygium cumini and Bombax cieba) were estimated for their antioxidant [DPPH (1,1-diphenyl 2-picryl-hydrazil) radical scavenging activity assay and FRAP (Ferric Reducing ability of Plasma) assay] at different concentrations (10 mg/L to 100 mg/L). Results exposed the occurrence of good antioxidant property of all the extracts. The maximum free radical scavenging potential was observed in stem bark of Psidium guajava with lowest IC50 value (43.76 mg/L) and the minimum free radical scavenging potential was observed in stem bark of Holoptelea integrifolia with the highest IC50 value (400 mg/L) by DPPH method. Among the selected plants, methanolic extracts of Syzygium cumini was observed to show maximum FRAP activity with the lowest IC50 value (71.08 mg/L) while the lowest FRAP activity was shown by Psidium guajava with the highest IC50 value (112.98 mg/L). Results of this study resolved that the stem-bark of selected trees have active biochemicals which are cause for their antioxidant property. Further investigation, and isolation of those active biochemicals may pave path for pharmaceutical industries to formulate new antioxidant drugs.