Isobel Mary Redmond (born 8 April 1953) is a former Australian politician who was the member for the electoral district of Heysen in the House of Assembly from 2002 to 2018.

[6] 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.

The issue resurfaced with revelations that Redmond had been "a central figure in a strategy meeting in Mr. Hamilton-Smith's office the day the documents were used against the government".

Despite winning a slender majority of the two-party-preferred vote, the Liberals only won 18 of 47 seats in the South Australian House of Assembly, an increase of three from the 2006 election.

After the 2006 election, the state Boundaries Commission drew an electoral map that theoretically have seen Labor lose government on a uniform 6.9 percent swing.

[15][16][17] Redmond came under mounting internal party and media pressure her performance during the 2010 election and she suffered dwindling poll ratings during the period of the Weatherill government.

[18] On 19 October 2012, her predecessor as opposition leader, Martin Hamilton-Smith, announced he would be challenging Redmond for the parliamentary leadership of the South Australian Liberal Party.

[20] Redmond resigned as the leader of the Liberal Party on 31 January 2013, citing the need to end "ongoing leadership speculation and disunity" as the primary factor in her decision.

Redmond suffered a swing against her at the 2014 election in Heysen on the primary, two-party and two-candidate vote, and faced the SA Greens after preferences.

[21][22] Redmond used parliamentary privilege on 20 May 2014 to claim that the Electoral Commission of South Australia's head commissioner Kay Mousley was "utterly corrupt" following the 2014 election result.