The quantitative chemical composition ofCoridothymus capitatusReichb. f. and ofSatureja thymhraL. from different sampling areas of Greece was analyzed satistically. An analysis of variance was performed to investigate the possibility of differences in constituent concentrations in oils obtained from plants of different origins. Also cluster analysis was performed and correlation and multiple correlation coefficients were obtained to investigate groupings or relationships among the oil constituents. The results showed many significant correlations between different constituents of both plant species. In the same plants a multiple correlation between terpenes, alcohols and single components was found.Satureja thymbrasamples could be separated in groups in relation to their sampling area. β-Caryophyllene showed significant differences between the sampling area for both plant species.