Louise Clare Pratt (born 18 April 1972) is an Australian politician who has been a Senator for Western Australia since 2016, and previously from 2008 to 2014. She is a member of the Labor Party, and served as a member of the Western Australian Legislative Council from 2001 to 2007.^[1] She was the youngest woman ever elected to the Legislative Council at the time of her election and the second open lesbian to be elected to an Australian parliament.^[2]

Pratt was born in Kalgoorlie, Western Australia. Her father was born in Devon, England, and she was a British citizen by descent until renouncing it prior to the 2007 election.^[3] Pratt grew up in the outer hills suburbs of Perth, where she attended Eastern Hills Senior High School.^[4] She studied arts at the University of Western Australia, where she became involved in student politics. After taking on a number of positions at her campus, she was elected as the state education officer for the National Union of Students, as well as a member of its national executive, in 1994.

After university, Pratt became involved in gay rights activism, serving as a regular spokesperson for Gay and Lesbian Equality, a prominent advocacy group in the state. This saw her addressing issues such as discrimination, unequal age of consent laws, homophobia in schools and property rights, and frequently saw her clash with the conservative Liberal Party of Western Australia government of Richard Court. It also saw Pratt working in concert with fellow activist Brian Greig, who became a Senator for and at one point interim leader of the Australian Democrats.

Pratt remained active in the Labor Party outside of student politics, and was the Labor candidate in the then-safe Liberal state seat of Alfred Cove at the 1996 state election. She worked at various times for former MLA Megan Anwyl, Jim McGinty, Geoff Gallop, and federal MP Carmen Lawrence. It was while working as electorate officer for Lawrence that Pratt won the third position on the Labor ticket for the East Metropolitan Region at the 2001 state election. Labor won the election against expectations, and Pratt scraped into the final seat in the region, becoming the youngest woman ever elected to the Legislative Council.

Pratt took her seat with the new term of the Legislative Council in May 2001. Her maiden speech was notable for the suggestion that the voting age in the state should be dropped to 16, but her first major contribution came in July, when she was appointed to a Ministerial committee on gay and lesbian law reform with a wide mandate to make recommendations regarding the elimination of discrimination in state law. Pratt, along with lesbian Green MP Giz Watson, played a major role in the committee, which ultimately made a wide range of recommendations, and which was tabled in the Western Australian parliament on 2 August 2001.^[5] The committee's recommendations were largely taken into law with the 2002 passage of the Acts Amendment (Lesbian and Gay Law Reform) Act 2002. Amongst the reforms included in the act were a complete ban on discrimination on the basis of sexual orientation, the granting of the right for same-sex couples to adopt children, a lowering of the age of consent from 21 to 16, the right for same-sex couples to inherit from a deceased partner, and the repeal of legislation which had made it an offence to promote homosexuality in schools.

After the conclusion of the law reform debate, Pratt became relatively less vocal in the media and received some criticism in the state media for making only 24 speeches in her first 15 months in parliament. However, she was no less active in her role – taking up the issue of greenhouse emissions through her position on the Standing Committee on Environment and Public Affairs, and advocating for midwife-led models of care in maternity services. She was comfortably re-elected at the 2005 state election, and was promoted to chair of the Environment and Public Affairs committee after the election. She also continued to pursue her interests in midwifery services through her role as a member of the Public Obstetric Services Select Committee, and served as Chair of the State Government Adoption Legislation Review Committee. Pratt made some headlines again in December 2005, arguing for the introduction of civil union legislation in the state.

Pratt has a son, born in October 2014, who she co-parents with her former partner Aram Hosie,^[7] a trans man and LGBTI community activist,^[18] as well as Western Australian state Labor MLC Stephen Dawson and his partner Dennis Liddelow, one of whom is the biological father.^[19] Pratt married her long term partner Rebecca Misich in June 2023.^[20] In May 2022 Pratt was appointed Deputy Government Whip in the Senate. In February 2024 Pratt announced her retirement from the Senate.^[21]

• Women in the Australian Senate
• Women in the Western Australian Legislative Council