Persain jird (Meriones persicus; Blanford, 1875) is the significant rodent of step and semi-arid habitats throughout of Iran . This study carried out to compare the morphometrical variables of Persian Jirds collected from different parts of Iran (i.e., Kurdistan, Isfahan, Fars, Elbourz, Tehran and ChaharMahal e Bakhtiari provinces). Measured morphological characteristics were: Tail, Head and Body and Ear length, Hind Foot size, Occipitonasal and Condylo-basal Length, Zygomatic and Least Inter-orbital Width, Length of tympanin bullae, upper molars and lower molars. All obtained morphometrical data were compared to gather to determine the likely differences between samples. Five and three individuals were caught directly from Kurdistan and Isfahan provinces respectively using catch live traps (Elliott Trap). Morphometrical variables of these samples were compared with the same records reported in "Iranian Mammals" text book. All measurements were standardized based on the head and body length of the each sample. Data normality distribution was considered using Kolmogorov–Smirnov test. Non parametric tests including; Kruskal-Wallis and Mann-Whitney was used for comparisons. Kruskal-Wallis results showed the significant difference between ear length, hind foot size and least inter-orbital width in all studied areas. These results are agree with the Bergman rules in wildlife ecology and could be due to the habitat and geographical differences between study sites. Mann-Whitney results no difference was between other skull variables within the samples, except the least inter-orbit width of the Kurdistan samples with Fars samples. This confirms that all of the collected samples in this study were belongs the Meriones genus.
