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 2022 Tanzania National Census, the population of Mbulu District was 238,272.
The District Commissioner is Chelestino Mofugo. Mbulu District is, since the 2015 general election, divided into two election counties: Mbulu Mjini and Mbulu Vijijini.
