The Shire of Plantagenet is a Local Government Area in the Great Southern region of Western Australia, managed from the town of Mount Barker, south of Perth and north of Albany. The shire covers an area of 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. Silviculture, especially plantations of Tasmanian Blue Gums (Eucalyptus globulus), is fast becoming a major industry in the shire. Local tourist attractions include the Porongurup Range and Stirling Range, a packed-out museum based within the original police station, and other pioneering structures such as St Werburghs Chapel.