Zdenko Matthew "Zed" Seselja (born 27 March 1977) is an Australian Liberal Party politician. He was elected to the Australian Senate as a representative of the Australian Capital Territory for a term which commenced on 7 September 2013. He was a member of the Australian Capital Territory Legislative Assembly from 2004 to 2013. He was the territory's 12th Opposition Leader, serving in that position from December 2007 to January 2013. Seselja is of Croatian descent.