Lucas Miedler (German pronunciation: [ˈluːkas ˈmiːdlɐ]; born 21 June 1996) is an Austrian tennis player. He has a career-high singles ATP ranking of World No. 201 achieved on 15 October 2018 and a doubles ranking of No. 53 achieved 7 November 2022. He has won two doubles titles on the ATP tour with compatriot Alexander Erler both at the home tournaments in Kitzbühel and in Vienna.