Part of the Administrative Zone 1, Asayita is bordered on the south by Afambo, on the west by Dubti, then on the north by the Awash River which separates it from Elidar, and on the east by Djibouti.
Part of the shoreline of Lake Gargori lie within the boundaries of this woreda.
Based on the 2007 Census conducted by the Central Statistical Agency of Ethiopia (CSA), this woreda has a total population of 50,803, of whom 27,284 are men and 23,519 women; with an area of 1,678.28 square kilometers, Asayita has a population density of 30.27.
[1] A sample enumeration performed by the CSA in 2001 interviewed 3036 farmers in this woreda, who held an average of 1.78 hectares of land.
Of the 5.39 square kilometers of private land surveyed, 71.59% was under cultivation, 1.22% pasture, 31.06% fallow, and 4.54% was devoted to other uses; the percentage in woodland was missing.