From the Wikipedia page 
Babati Rural District is a district of Manyara Region of Tanzania, East Africa. The administrative capital of the district is Babati town, 172 km (107 mi) south of Arusha. The district covers an area of 6,069 km2 (2,343 sq mi), a large proportion (640 km2) of which is covered by the water bodies of Lake Babati, Lake Burunge and Lake Manyara. The district is bordered to the north by Arusha Region, to the south east by Simanjiro District, to the south by Dodoma Region, to the south west by Hanang District, and to the north west by Mbulu District. Babati Urban District is located within the district.