The essential oil composition of four genetically diverse stocks of Murraya koenigii leaves cultivated at the CIMAP Research Farm, Lucknow, were analysed by GC and GC-MS. The oil from the stock of the northern Indian plains, Lucknow, showedˇ-pinene (70.0%),ˇ-caryophyllene (6.5%) and˛-pinene (5.4%) as the major constituents, while the oil from the stock of the lower Himalayan range, Pant Nagar, showed˛-pinene (65.7%), -pinene (13.4%) andˇ-phellandrene (7.4%) as the major constituents. In contrast to the above, the oil from the stock of southern India, Kozhikode, showedˇ-caryophyllene (53.9%), aromadendrene (10.7%) and˛-selinene (6.3%) as the major constituents. On the other hand, the oil from the stock of eastern India, Bhubaneshwar, showeď -phellandrene (30.2%),ˇ-caryophyllene (24.2%),˛-pinene (15.0%), (E)-ˇ-ocimene (5.0%) and aromadendrene (4.5%) as the major constituents. The GC-MS analysis of the stock oil samples from the northern Indian plains, lower Himalayan range, southern and eastern India resulted in the identification of 65, 56, 57 and 66, constituents, representing 99.2%, 98.8%, 87.4% and 98.2% of the oils, respectively.