This paper highlighted the antibacterial and antioxidant properties of the leaves extracts of three citrus plants namely: Citrus microcarpa (calamansi), Citrus aurantium (dalandan) and Citrus maxima (pomelo). All citrus leaves extract exhibited antibacterial activity against S. aureus but not in E. coli. C. microcarpa ethanol extract significantly recorded the highest diameter zone of inhibition of 13.53 mm while C. maxima ethanol extract had the lowest diameter (11.26 mm). Among crude extracts, C. maxima significantly showed the widest diameter zone of inhibition of 10.49 mm. In DPPH scavenging assay, C. microcarpa significantly recorded the highest scavenging activity of 48.67%, followed by C. maxima having 43.51%. C. aurantium had the lowest activity. Interestingly, C. microcarpa contained the highest total phenolic content of 309.38 mg AAE/g sample whereas C. aurantium had the lowest phenolic content of 228.21 mg AAE/g sample. Therefore, leaves of citrus plants contain valuable compounds with medicinal and pharmacological importance.
