Robert Ivan "Rob" Lucas (born 7 June 1953) is an Australian politician and a member in the South Australian Legislative Council since the 1982 election, representing the South Australian Division of the Liberal Party of Australia. Presently he serves as Shadow Treasurer and in several other portfolios. Lucas is by seven years the Father of the Parliament.
Before his entry into politics, Lucas gained Bachelor of Science and Bachelor of Economics degrees, as well as an MBA.
In office, Lucas has been a Minister for Education and Children's Services, Minister for Industry and Trade and Minister for Government Enterprises. He also served as Treasurer of South Australia from the 1997 election until his party's defeat at the 2002 election. After that time until April 2007, Lucas served as Shadow Treasurer, Shadow Minister for Industry and Trade and Police, and between 2005 and 2006 was also Shadow Minister for Economic Development and Science and Information Economy. Between 2002 and 2007 Lucas held the position of Leader of the Opposition in the Legislative Council.
The appointment of Lucas, a member of the upper house Legislative Council, as Treasurer was a break in convention as previous Treasurers had been members of the lower house the House of Assembly. The precedence in appointing a member of the upper house as Treasurer was in New South Wales with the appointment of Michael Egan in 1995.
In 2014 Lucas returned to the Treasury portfolio albeit as Shadow Treasurer following the retirement of the previous portfolio holder and former Liberal leader Iain Evans.