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.

Between 1846 and 1872 he was a lawyer in Tisovec (Tiszolc), an official of several counties and an associate judge of the Commercial Court of Debrecen.

In 1847, just before the 1848-1849 Revolution, Daxner outlined a program unifying the requests for national (Slovak), cultural, political and social liberties.

Lukáš Perný emphasizes that Daxner transformed Rousseau's idea of equality between people into the idea of equality between nations and also adds that Daxner was one of the most advanced social and philosophers of law in the Slovak 19th century.

[1] Dalimír Hajko states that "all of Daxner's political considerations published in the press were directly connected primarily with questions of practical ethics and philosophical questions of law, because it was these problem areas that most recently connected with the national emancipation process…" [2] Rudolf Dupkala recalls that Daxner followed the Štúr´s understanding of the nation, the concept of the social contract according to J. J. Rousseau and the French Revolution.