Isobel Mary Redmond (born 8 April 1953) has been the member for the electoral district of Heysen in the House of Assembly since 2002. She was the parliamentary leader of the South Australian Division of the Liberal Party of Australia and the Leader of the Opposition in the Parliament of South Australia between 2009 and 2013, and was the first female leader of a South Australian state major party. Under Redmond, the Liberals won 18 of 47 seats in the South Australian House of Assembly at the 2010 election, a gain of three from the 2006 election. She resigned as leader of the Liberal Party on 31 January 2013.
Redmond attended Heathcote High School on the outskirts of Sydney, graduating in 1971. In the 1970s she was briefly a member of the Australian Labor Party.
In the late 1970s Redmond and her husband Jim moved to Stirling, South Australia in the Adelaide Hills. After receiving the winnings of a lottery ticket from her parents she set up her own legal firm. She also worked with Jay Weatherill and Patrick Conlon at Duncan Basheer in the early 90s.
Redmond was also elected to Stirling Council in 1982, and in 1999 was elected as the first female president of the Stirling Rotary club.
Redmond won the electoral district of Heysen in the South Australian House of Assembly at the 2002 state election and from 2004 held various shadow ministries. She is linked to the conservative Evans family faction within the Liberal Party's South Australian division.