The aroma from the leaves of Citrus deliciosa Ten. and Citrus reticulata Blanco cultivated in Egypt were analysed using GC-MS. Eighteen components were identified in each species. The leaves of the investigated species showed 0.4% v/w and 0.3% v/w oil, respectively. Methyl-N-methylanthranilate was the major component in C. deliciosa Ten. (41,4%) while, a-Pinene was the maior one in the leaf oil of C. reticulata Blanco (36.2%o). The proportion of the terpene hydrocarbons and the oxygenated components were 53.9% and 44.84% in the leaf oil of C. deliciosa Ten., and 65.43% and 22.8% in the leaf oil of C. reticulata Blanco, respectively. Each of the prepared oils showed a remarkable antimicrobial and / or antifungal effects.