Penelope (Penny) Ying-yen Wong (Chinese 黃英賢 pinyin Huáng Yīngxián), born November 5, 1968 has been an Australian Labor Party member of the Australian Senate since 2002, representing South Australia. She is Australia's first openly lesbian and Asian-born female parliamentarian.

Wong was born in Kota Kinabalu, Malaysia, and moved to Australia at the age of eight. After spending a year on exchange in Brazil, Wong studied arts/law at the University of Adelaide. While at university, she worked part time for the Construction, Forestry and Mining and Energy Union .

She also became involved in political activism at university, winning a position on the National Executive of the National Union of Students. In 1988, Wong joined the Australian Labor Party, winning a position as a delegate to the party's state convention the following year. She has been a delegate each year since, with the exception of 1995.

Wong graduated from university in 1992, and continued on with the CFMEU, working as an industrial officer, gaining admission to the bar in 1993. During 1995 and 1996, she acted as an advisor to New South Wales state government, specialising in the area of forest policy. On returning to Adelaide, she began practising law, won a position on the party's state executive, and also took on work as a legal officer with the Liquor, Hospitality and Miscellaneous Workers Union .

Wong ran for pre-selection for the Senate in 2001, and found herself with the top spot on the party's South Australian ticket, as a result of affirmative action policies and factional changes. Wong is a member of Emily's List, the support network for Labor women, and currently sits on a number of Senate committees, primarily those related to economics.

She has been a vocal critic of Prime Minister John Howard's ban on same-sex marriages, despite the ban also having the support of her own party.