Equilibrium headspace analysis in combination with gas chromatography/mass spectrometry (GC/MS) was used to identify volatile compounds from the leaves of 76 individual plants of Agastache rugosa collected from 16 regions in South Korea. Chemometric investigation of the intraspecific variability in volatiles led to identify five main chemotypes; estragole (Type 1) as the major component, and the other four chemotypes; methyleugenol (Type 2), methyleugenol+limonene (Type 3), menthone (Type 4) and menthone+pulegone (Type 5). Soraksan collection was classified methyeugenol type; Hambaeksan collection, methyleugenol+limonene type; Bongpyeong and Inje (two of three sample) collection, menthone type; Hongcheon and Inje (one of three sample) collection, menthone+pulegone type; all of the others colletions, estrgole type.