Mark Francis McArdle (born 21 December 1956) is an Australian politician and former Deputy Leader of the Opposition in Queensland. He was a Member of the Legislative Assembly of Queensland between 2004 and 2020, representing the electorate of Caloundra on the Sunshine Coast. Initially a Liberal Party member, in 2007 he became the party leader and the following year oversaw a merger with the National Party that produced the Liberal National Party.