Abstract: Many folkloric medicinal plants are found in Tinoc, Ifugao, Cordillera Administrative Region, Philippines. These plants were used as traditional medicines by the local ethnic groups since time immemorial. This study aimed to evaluate the DPPH (2, 2-diphenyl-1-picrylhydrazyl) free radical scavenging activity and to determine the bioactive components present in the ethanolic leaf extracts with antioxidant activity. Ethanolic leaf extracts of Medinilla pendula Merr., Rubus fraxinifolius Hayata, Melastoma polyanthum Blume, Desmodium sequax Wall., Astilbe rivularis Buch.-Ham ex. D. Don, Drymaria cordata (L.) Willd. ex J.A. Schultes, Allium odoratum L., Physalis minima (L.), Centella asiatica (L.) Urban, and Vaccinium myrtoides (Bl.) Miq. were tested for in vitro antioxidant activity using the DPPH free radical scavenging assay with ascorbic acid as standard antioxidant.