Sefwi-Wiawso Municipal forms part of twenty two (22) Metropolitan, Municipalities and Districts in the Western Region of Ghana.

The Administrative Capital of the Municipality is Wiawso.

The Municipality shares boundaries with Bibiani-Anhwiaso-Bekwai to the east, to the west with Bodi District, to the north with Asunafo South in the Brong Ahafo Region and to the south with Aowin District.

The population of the municipality according to 2010 population and housing census stands at 139,200 with 69,753 males and 69,447 females.