SA Greens have consistently polled strongest in Heysen. Greens candidate Lynton Vonow came within a few percent of winning the overlapping federal seat of Mayo at the 2008 by-election. Vonow contested Heysen for the Greens at the 2014 election and overtook the Labor candidate coming second after preferences with a 39 percent two-candidate preferred vote from a 19.7 percent primary vote. The Greens also polled well in neighbouring seats such as Kavel and Davenport with primary votes over 15 percent. The 2018 election saw Nick Xenophon's SA-BEST receive 48.2 percent of the two-candidate preferred vote in Heysen which was the closest they came to winning a lower house seat. At the 2022 state election, the Liberals fell to only 51 percent of the two-party vote amid their statewide collapse, only the second time the seat had been marginal against Labor. Members for Heysen Election results Notes References ECSA profile for Heysen: 2018 ABC profile for Heysen: 2018 Poll Bludger profile for Heysen: 2018 Electoral districts of South Australia 1970 establishments in Australia 1977 disestablishments in Australia 1985 establishments in Australia