Between 2002 and 2005, a number of districts were separated from West Shewa Zone to create Southwest Shewa Zone. Towns in it include Waliso (the capital) and Tulu Bolo.
During the years 2002 through 2005, parts of West Shewa Zone were split off to form Southwest Shewa Zone. The zone's main towns include Waliso, which serves as its administrative center, and Tulu Bolo.