Rebekha Carina Sharkie (née Che; born 24 August 1972) is an Australian politician who has been the member of parliament (MP) for the South Australian division of Mayo since 2016. She is a member of the Centre Alliance party, and has been its sole member of parliament since 2020.

At the 2016 federal election she defeated Liberal Jamie Briggs, and was the first Nick Xenophon Team member to be elected to the Australian House of Representatives. On 11 May 2018, Sharkie resigned from the House of Representatives as a part of the 2017–18 Australian parliamentary eligibility crisis. She contested the 2018 Mayo by-election on 28 July, and was returned to parliament.

Sharkie was born on 24 August 1972 in Torbay, England in 1972 to British and American parents. The family moved to Australia when Sharkie was two years old. She attended Eyensbury Senior College for her high school education and went on to study international relations and public policy at Flinders University. Sharkie became a naturalised Australian on 19 March 2007, and formally renounced her British citizenship in 2016.

Prior to working as a political advisor, Sharkie worked as a paralegal in Darwin and South Australia. In 2012 she was appointed as national executive officer of Youth Connections, a service targeting youth employment. When that program was defunded by the Liberal government at the end of 2014, she became senior manager and head of donor relations at Helping Young People Achieve (HYPA), a charity assisting young disadvantaged people in South Australia.

As a high school student, Sharkie handed out how-to-vote cards for Australian Democrats candidate Janine Haines. In 2006, she worked as a researcher for state Liberal leader Isobel Redmond. In 2008, she worked as an electorate officer for federal Liberal MP Jamie Briggs for six months. Sharkie also worked for South Australian state Liberal MP Rachel Sanderson. Although she had worked for the Liberals for some time, she was only a formal member of the party from 2010 to 2012.

Sharkie considered running for the Liberals in the 2014 state election in the safe seat of Schubert, only to be told that she needed the blessing of federal minister Christopher Pyne and federal senator Cory Bernardi, the highest-ranking federal MPs from the moderate and conservative factions of the SA Liberals, before seeking preselection. Sharkie told The Australian that when she learned she couldn't stand without the "anointing" of Pyne and Bernardi, she was appalled. She asked, "Are you serious? A branch doesn't choose?" Combined with her anger at the "ditch the witch" campaign against Julia Gillard, she was thus very receptive when then-independent Senator Nick Xenophon announced he was forming his own party to stand candidates in the upcoming federal election. Initially serving as a volunteer for the newly-formed Nick Xenophon Team, she ultimately agreed to stand in Mayo. Although Mayo had been a very safe Liberal seat for most of its existence, polling suggested that if Labor directed its preferences to Sharkie, she could take the seat off the Liberals.

At the 2016 federal election, Sharkie defeated Briggs with 55 percent of the two-candidate preferred vote. On the first count, she finished only three points behind Briggs, who lost over 16 percent of his primary vote from 2013. This allowed her to ultimately defeat Briggs on Labor preferences.

Sharkie became the first NXT member of the Australian House of Representatives, joining a cross-bench of five members not aligned to either major party. She is the first woman and the first non-Liberal member to represent Mayo.