Brian Follett Walker is an Australian politician and medical practitioner. At the 2021 state election, Walker was elected to the Western Australian Legislative Council as a Legalise Cannabis WA member for the East Metropolitan Region.

Born in Malaysia to Scottish parents, Brian was educated at Scotch College, Perth, prior to studying medicine at the University of Dundee. Since graduating, he has practised medicine in Germany, the Soviet Union, the UK, and Hong Kong, returning to Perth in 2008 to set up a specialist GP practice in the Perth Hills.

Brian has a longstanding commitment to holistic wellness, which continues to strongly influence his approach to both medicine and politics.