Abstract Using GC and GC/MS, in the analysis of the essential oils of Achillea abrotanoides, A. clypeolata, A. depressa and A. stricta, 36, 30, 43 and 39 constituents were identified and determined, respectively. The main components of the oil of A. abrotanoides were Î²-thujone (16.8%), pinocarvone (15.6%) and 1,8-cineole (11.3%). The prevailing compounds in the oils of A. clypeolata and A. depressa were 1,8-cineole (38.6% and 24.1%) and camphor (19.9% and 38.7%). In the oil of A. stricta prevailed camphor (23.7%), borneol (17.3%) and 1,8-cineole (14.1%).