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.
[2] His mayorship was utterly unsuccessful, and helped to lay the path to the Austrian Centralist victory in the elections of 1869.
Among other things, he served as president of the scientific association Slovenska matica,[4] and of the Slovene section of the Sokol movement.