The shire covers an area of 4,792 square kilometres (1,850 sq mi)[2] and includes the communities of Narrikup, Rocky Gully, Kendenup and Porongurup.

The region is noted for agriculture, principally wheat, sheep (wool and meat), beef cattle, wine, canola and olives.

[23] Due to cost issues, the City of Albany sought to dispose of its share of the facility, and an agreement was made to transfer full ownership and responsibility to the Shire of Plantagenet.

[24] The Mount Barker Power Company Pty Ltd has constructed slightly to the north of the township a three Enercon turbine 73m high windfarm costing $8.3 million.

A rubbish tip is located on O'Neill Road south of Mount Barker and transfer stations are at Kendenup, Porongurup and Narrikup.