Steam distillation and hydrodistillation are the two methods used to extract essential oil from lemon grass. This study demonstrated that both the steam distillation and hydrodistillation processes are appropriate for extracting the essential oil of lemon grass because of their ability to yield higher yields of 1.05% and 1.02%, respectively, and because of their faster extraction periods. After analysis with GC-MS (gas chromatography mass spectrometry) and GLC (gas liquid chromatography), the total number of major and minor chemical molecules were found to be approximately similar. That is, the total number of chemical molecules in the lemon grass oil obtained by using steam and hydro distillation extraction methods, respectively, were 31 and 29.