The essential oil obtained from leaves of Origanum vulgare subsp. hirtum was analysed by GC-MS. Twenty-eight components were identified accounting for 99.4 % and 99.5 %, the oils of two region (Büyükeceli and Delikkaya), respectively. The major components were carvacrol (51.4 % and 63.3 %), linalool (28.3 % and 2.3 %), λ-terpinene (6.0 % and 9.9 %) and p-cymene (4.8 % and 8.7 %). The oils contained mainly oxygenated monoterpenoids and monoterpenoid hydrocarbons. © 2012, Copyright Har Krishan Bhalla & Sons.