Etbin Henrik Costa (18 October 1832 – 28 January 1875) was a Slovene national conservative politician and author. Together with Janez Bleiweis and Lovro Toman, he was one of the leaders of the Old Slovene political party. He was born in a wealthy bureaucrat family of Italian origin in the Lower Carniolan town of Novo Mesto, then part of the Austrian Empire (now in Slovenia), and baptized Ethbin Heinrich Costa. His father (1796–1870) was a historian. Etbin Henrik Costa graduated in philosophy at the University of Vienna and law at the University of Graz. He died in Ljubljana in 1875.