 On 4 February 2007, the Afar Regional Cabinet approved the division of this woreda, creating a new woreda out of the western part, with its administrative center to be at Hadar.The Ethiopian paleoanthropologist Yohannes Haile-Selassie led a number of digs in this woreda between 2004 and 2007.Based on the 2007 Census conducted by the Central Statistical Agency of Ethiopia (CSA), this woreda has a total population of 90,673, of whom 49,705 are men and 40,968 women; with an area of 5,345.71 square kilometers, Mille has a population density of 16.96.