Štefan Marko Daxner, Hungarian: tóth-zabari Daxner István Márk (22 December 1822, Tiszolcz (German: Theißholz, Slovak: Tisovec), Gömör-Kis-Hont, Kingdom of Hungary, Austrian Empire – 11 April 1891, Tiszolc, Kingdom of Hungary) was an ethnic Slovak lower nobleman, politician, lawyer, and poet in the Kingdom of Hungary.
He was a member of what became known as the Ludovít Štúr generation.
His family (Hungarian: a Daxner család) is an old lower noble family, which emigrated from Switzerland to the Kingdom of Hungary in the 14th century.