The essential oil analysis of Mentha arvensis L. (Corn Mint) has been done for the first time from three locations of North India. The extraction yields for the essential oils of three locations of M. arvensis were: 0.38% for sample M-1 collected from Fatehpur (415m), 0.31% for sample M-2 from Dhameta (435m) and 0.36% for sample MP from Patiala (250m). The oils were analyzed by GC-MS, the components of oil were identified by comparing their retention indices and mass spectra fragmentation patterns with those stored on the MS-computer library and also from the published literatures. The major constituents reported from essential oils of M. arvensis were: L-Menthone, Menthol, Isomenthone, Eucalyptol, Piperitone oxide, Carvone, dl-Limonene, trans-Dihydrocarvone, Germacrene-D, etc. from all three samples collected from Punjab and Himachal Pradesh of Northern India.