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Background: Human skeleton is an excellent source for genetic, anthropological and forensic investigations. Pelvic bones are very important for sex determination, followed by skull & the long bones. Various parameters and indices are available based on which the sex can be determined using sacrum. These parameters and indices vary region wise also. The sacrum has always attracted the attention of the medico-legal experts for establishing its gender, because of its contribution to pelvic girdle and associated functional gender differences. In present study the sacral index in Eastern Rajasthan population is calculated and compared with the study done earlier in Western Rajasthan & North Indian Population.Objective: To study the Sacral Index in the population of Eastern Rajasthan, so that it can be compared with other studies on populations of Western Rajasthan & other regions of North India.