The Assin Central Municipal is one of the 261 Metropolitan, Municipal and District Assemblies (MMDAs) in Ghana and is among the 22 MMDAs in the Central Region with its administrative capital as Assin Fosu.
It lies within Longitudes 1° 05’ East and 1° 25 West and Latitudes 6 ° 05’ North and 6° 40 South and covers an area of about 1,500 sq. km.
The Municipality shares common boundaries with Twifo Hemang Lower Denkyira District on the west, Assin South District on the south, Asikuma Odoben Brakwa District and Ajumako Enyan Esiam District on the east, Upper Denkyira East Municipal on the north-west and Adansi South District on the north.
The population of the Municipality according to 2010 population and housing census stands at 161,341 with 80,254 male and 81,087 female.