Mbulu District is one of the six districts of the Manyara Region of Tanzania. It is bordered to the north by the Arusha Region and Lake Eyasi, to the east by the Babati Rural District, to the south by the Hanang District, and to the west by the Singida Region. According to the 2002 Tanzania National Census, Mbulu District had a population of 237,882 inhabitants. According to the 2012 Tanzania National Census, the population of Mbulu District was 320,279. The 2015-2020 members of parliaments are Zacharias Isaay (CCM) and Flatei Massay (CCM), for Mbulu Mjini and Mbulu Vijijini respectively.