Sandra Myrtho Kanck (born 20 April 1950) is a South Australian politician. She was a member of the South Australian Legislative Council from 1993 to 2009, first elected for the Australian Democrats for an eight-year term at the 1993 election and was re-elected for the Democrats for another eight-year term at the 2002 election. Kanck announced her parliamentary resignation in November 2008, taking effect in January 2009. Democrats nominee David Winderlich filled the upper house casual vacancy in a joint sitting of the Parliament of South Australia in February 2009.