The Builsa South District is one of the 261 Metropolitan, Municipal and District Assemblies (MMDAs) in Ghana, and forms part of the 15 of Municipalities and Districts in the Upper East Region.

Builsa South District lies between longitudes 10 05’ West and 10 35’ West and latitudes 100 20’ North and 100 50’ North of the equator. The administrative capital of the District is Fumbisi.

The District shares boundaries with the Builsa North District to the north, Mamprugu Moagduri District in the Northern Region to the south, West Mamprusi District to the west, and the Sissala East Municipal in the Upper West Region to the east.

In terms of size, it covers a total land area of 1,289 square kilometres.

The population of the District according to 2010 population and housing census stands at 36,575 with 18,328 males and 18,247 females.