Offinso Municipal Assembly is one of the 30 District Assemblies in the Ashanti Region and has its capital as Offinso . The district lies between longitudes 10 50 W and 10 45 E and latitudes 70 20 N and 60 50 S.
The total land area is about 741 kilometres square. It shares boundaries with the Offinso North District Assembly in the North, the Tano South District and Ahafo Ano South District in the West. The Afigya Sekyere District Assembly in the East and the Atiwma Nwabiagya District and Kawbre District Assembly in the South. The District was established by Legislative Instrument (L.I) 1909.
The population of the Municipality according to the 2010 Population and Housing Census stands at 76,895 with 37,068 males 39,827 females.