Obuasi Municipal Assembly was carved out of the erstwhile Adansi West District Assembly on the strength of executive instruments (E. I.) 15 of December, 2003 and Legislative Instrument L. I. 1795 of 17th March, 2007. 

The Municipality is located between latitudes 5 º35N and 5 º65N, and longitudes 6º35’W and 6º90’W. It covers a total land area of 220.7 square km.

It is located in the South- Western part of the Ashanti Region. It is 64 km from Kumasi, the regional capital. The Municipality is bounded on the south by Upper Denkyira District of the Central Region, east by Adansi South, west by Amansie Central, and north by Adansi North. Obuasi is the Administrative Capital where the famous and rich Obuasi Gold Mine, now Anglo Gold Ashanti is located.

The population of the Municipality according to the 2010 Population and Housing Census stands at 168,641 with 81,015 males 87,626 females.