From the Wikipedia page 
Igunga is one of the seven districts of the Tabora Region of Tanzania. It is bordered to the north by the Shinyanga Region, to the east by the Singida Region, to the south by the Uyui District and to the west by the Nzega District. Its administrative seat is the town of Igunga. Igunga is now divided by two Constituencys: Igunga Constituency and Manonga Constituency, whereby Manonga town is Choma Chankola.