Duncan McFetridge (born 27 January 1952) is an Australian politician who represented the South Australian House of Assembly seat of Morphett for the Liberal Party from the 2002 election until 2018. Entering shadow cabinet in 2004, he was re-elected at the 2006, 2010 and 2014 elections, and holds the seat with a margin of 12.9 points. This was reduced to 7.7 points following the 2016 redistribution. McFetridge lost his shadow cabinet position in January 2017.