It was created by the Acts Amendment (Electoral Reform) Act 1987, and became effective on 22 May 1989 with seven members who had been elected at the 1989 state election three months earlier.

The region includes the cities of Albany, Bunbury and Mandurah.

Legislation to abolish the region, along with all other Western Australian Electoral Regions was passed in November 2021, with the 2025 state election to use a single state-wide electorate of 37 members.

[1] The Region is made up of several complete Legislative Assembly districts, which change at each distribution.

Albany, Bunbury, Collie, Mandurah, Mitchell, Murray, Stirling, Vasse, Warren, Wellington (10) Albany, Bunbury, Collie, Dawesville, Mandurah, Mitchell, Murray-Wellington, Stirling, Vasse, Warren-Blackwood (10) Albany, Bunbury, Capel, Collie-Wellington, Dawesville, Leschenault, Mandurah, Murray, Stirling, Vasse, Warren-Blackwood (11) Albany, Blackwood-Stirling, Bunbury, Collie-Preston, Dawesville, Mandurah, Murray-Wellington, Vasse (8) Albany, Bunbury, Collie-Preston, Dawesville, Mandurah, Murray-Wellington, Vasse, Warren-Blackwood (8) As per 2015 As 7-member seat: As 6-member seat: Legend: Since its creation, the electorate has had 17 members.