Fiona Heather Patten (born 6 May 1964) is an Australian politician.
She is the leader of the Reason Party and has a seat in the Victorian Legislative Council, representing the Northern Metropolitan Region.
Patten established the Australian Sex Party in 2009 to focus on personal freedoms after deep frustration with stagnation on censorship, freedom, marriage equality and drug law reform.
On 22 August 2017, it was announced that the Australian Sex Party would be changing its name to the Reason Party.Before entering politics, Patten was the CEO of Australia’s national adult industry association, Eros Association.
She championed sexual rights and health movements for more than 20 years, particularly on HIV/AIDS, after initially starting out as a small businesses owner with her own fashion label.